Interference (baseball)
Encyclopedia
In baseball
Baseball
Baseball is a bat-and-ball sport played between two teams of nine players each. The aim is to score runs by hitting a thrown ball with a bat and touching a series of four bases arranged at the corners of a ninety-foot diamond...

, interference is an infraction where a person illegally changes the course of play from what is expected. Interference might be committed by players on the offense, players not currently in the game, catchers, umpires, or spectators; each type of interference is covered differently by the rules.

Offensive interference

The most common incidence of interference is when a member of the offensive team physically hinders the defensive team, decreasing their chances to make an out or increasing the chance that a baserunner will advance. Whenever this offensive interference occurs, the ball becomes dead. If the interference was committed by a batter or a baserunner, that player is called out
Out (baseball)
In baseball, an out occurs when the defensive, or fielding, team effects any of a number of different events, and the umpire rules a batter or baserunner out. When a player is called out, he is said to be retired...

 and all other runners must return to the bases they occupied at the time of the interference. If interference is committed by a runner with the obvious intent of preventing a double play
Double play
In baseball, a double play for a team or a fielder is the act of making two outs during the same continuous playing action. In baseball slang, making a double play is referred to as "turning two"....

, the batter-runner will be called out in addition to the runner who committed the interference. If interference is committed by the batter-runner before he reaches first base with the possible intent of preventing a double play, the runner closest to scoring is called out in addition to the batter-runner. If interference is committed by a retired runner or by some other member of the offensive team, the runner who is most likely to have been put out will be called out.

Under Little League
Little League
Little League Baseball and Softball is a non-profit organization in South Williamsport, Pennsylvania, United States which organizes local youth baseball and softball leagues throughout the U.S...

 (LL), high school (NFHS) and college (NCAA) rules, if interference is committed by a runner with the effect of preventing a likely double play, regardless of his intent, the batter-runner will be called out in addition to the runner who committed the interference.

Also under LL and NFHS rules only, all runners are required to attempt to avoid collisions; if a runner fails to do so, he is guilty of malicious contact, which is one kind of offensive interference. Malicious contact carries the additional penalty of ejection from the game. In contrast, in professional and higher amateur baseball, violent collisions can occur without any interference (or obstruction), especially when a fielder is receiving a thrown ball near a base where a runner is trying to reach. Any collision that occurs in this situation is not interference, because the fielder's action is in regard to a thrown ball. As long as such a runner's actions are related to his attempt to reach the base, he cannot be called for interference. The most common case of this is when a runner is attempting to score and the catcher has control of the ball; if the catcher is in the path between third base
Third Base
is a 1978 Japanese film directed by Yōichi Higashi.-External links:...

 and home plate
Home Plate
Home Plate is the fifth album by Bonnie Raitt, released in 1975 .-Track listing:#"What Do You Want the Boy to Do?" – 3:19#"Good Enough" – 2:56#"Run Like a Thief" – 3:02...

, the baserunner may strike the catcher with his body in an attempt to dislodge the ball from the catcher's hand and then reach home plate. This is usually attempted only when the play is close; when the catcher is set up and ready, the runner has little chance of knocking the ball away. Any such attempt presents a significant chance of injury to the baserunner, which has prompted the malicious contact rule to be used more often.
In addition to the general subjective definition of offensive interference, it is also interference by specific rule when:
  • The bat hits the ball a second time in fair territory, such as while the bat is being dropped;
  • A batter or runner intentionally deflects the course of a batted ball in any manner;
  • A member of the offensive team stands near a base to impersonate a baserunner or to otherwise confuse or hinder the defense;
  • A coach physically assists a runner in returning to or leaving first or third base;
  • A batter is struck by a ball thrown from the home plate area while running to first base with a foot entirely outside the three-foot running lane, before the batter reaches first base;
  • A runner makes contact with a batted ball that did not go through or by a fielder, unless no infielder had a chance to immediately field the ball (in this instance, the runner is out and the batter is credited with a base hit);
  • A runner makes contact with a fielder attempting to field a batted ball, except the batter with the catcher in the immediate vicinity of home plate immediately after the ball was batted; or
  • A member of the offensive team intentionally touches a thrown ball, or intentionally hinders a fielder attempting to make a throw.
  • The batter physically hinders the catcher's opportunity to throw out a baserunner while standing outside of the batter's box.


There are some exceptions to the penalty for offensive interference.
  • If there are fewer than two outs and a runner is trying to score, and the batter interferes with the tag attempt at home plate, then the runner is out for the batter's interference, while the batter is not out. If there are two outs in this situation, the normal interference penalty applies: the batter is out and the run does not score.

Verbal interference

At some levels of play, verbal as well as physical hindrance can be called for interference. For example, if a runner or other member of the offense calls out "foul" on a fair ball or "mine" on a fly ball, he may cause the defense to react differently than they otherwise would have, resulting in an interference call. This is not called as interference in professional or higher amateur baseball.

Cases of offensive interference

On October 19, in game six of the 2004 American League Championship Series
2004 American League Championship Series
The 2004 American League Championship Series was the Major League Baseball playoff series to decide the American League champion for the 2004 season. It was played between the Boston Red Sox and New York Yankees, at Fenway Park and the original Yankee Stadium, from October 12 to October 20, 2004...

, Alex Rodriguez
Alex Rodriguez
Alexander Emmanuel "Alex" Rodriguez is an American professional baseball third baseman with the New York Yankees of Major League Baseball. Known popularly by his nickname A-Rod, he previously played shortstop for the Seattle Mariners and the Texas Rangers.Rodriguez is considered one of the best...

 of the New York Yankees
New York Yankees
The New York Yankees are a professional baseball team based in the The Bronx, New York. They compete in Major League Baseball in the American League's East Division...

 intentionally swatted the arm of Boston Red Sox
Boston Red Sox
The Boston Red Sox are a professional baseball team based in Boston, Massachusetts, and a member of Major League Baseball’s American League Eastern Division. Founded in as one of the American League's eight charter franchises, the Red Sox's home ballpark has been Fenway Park since . The "Red Sox"...

 pitcher Bronson Arroyo
Bronson Arroyo
Bronson Anthony Arroyo , is a Major League Baseball right-handed pitcher for the Cincinnati Reds and an aspiring musician. He has previously played for the Pittsburgh Pirates between 2000 and 2002 and Boston Red Sox from 2003 to 2005...

, who was attempting to tag
Tag out
In baseball, a tag out, sometimes just called a tag, is a play in which a baserunner is out because he is touched by the fielder's hand or glove holding a live ball while the runner is in jeopardy...

 Rodríguez out. The ball came loose, initially enabling Rodríguez to advance and the previous runner Derek Jeter
Derek Jeter
Derek Sanderson Jeter is an American baseball shortstop who has played 17 years in Major League Baseball for the New York Yankees. A twelve-time All-Star and five-time World Series champion, Jeter's clubhouse presence, on-field leadership, hitting ability, and baserunning have made him a central...

 to score, but instead Rodríguez was ruled out on the interference and Jeter returned to first, under the general definition of the rule above.

A famous alleged offensive interference occurred in the third game of the 1975 World Series
1975 World Series
The 1975 World Series was played between the Boston Red Sox and Cincinnati Reds . It has been ranked by ESPN as the second-greatest World Series ever played...

. With a runner on first, Cincinnati Reds player Ed Armbrister
Ed Armbrister
Edison Rosanda "Ed" Armbrister is a former outfielder in Major League Baseball who had a five-year career from 1973 through 1977 with the Cincinnati Reds...

 laid down a sacrifice bunt. Red Sox catcher Carlton Fisk
Carlton Fisk
Carlton Ernest Fisk , nicknamed "Pudge" or "The Commander", is a former Major League Baseball catcher. During a 24-year baseball career, he played for both the Boston Red Sox and Chicago White Sox .Fisk was known by the nickname "Pudge" due to his 6'2", 220 lb frame...

 attempted to field the ball and throw to second base and get the lead runner out. However, Armbrister did not immediately run to first base but instead stood essentially still in the vicinity of home plate, forcing Fisk to jump into him in order to make the throw. As a result, Fisk's throw went into center field, and the Reds ended up with runners on first and third and none out. The Red Sox protested, saying that Armbrister interfered, but home plate umpire Larry Barnett
Larry Barnett
Lawrence Robert Barnett is a former umpire in Major League Baseball who worked in the American League from 1969 to 1999 before becoming the major leagues' supervisor of umpires in 2000-2001.-Career:...

 refused to change the call. The rules at the time did not mention a batter-runner/catcher collision, but the official interpretation issued to the umpires did; there is no violation on such unintentional contact. http://xsorbit27.com/users5/historicbaseball/index.php?topic=40.0 The Red Sox lost the game, and ultimately lost the series in seven games, arguably in part due to the Armbrister play.

Umpire's interference

It is umpire's interference when the umpire
Umpire (baseball)
In baseball, the umpire is the person charged with officiating the game, including beginning and ending the game, enforcing the rules of the game and the grounds, making judgment calls on plays, and handling the disciplinary actions. The term is often shortened to the colloquial form ump...

 hinders a catcher's attempt to throw anywhere. In this case, if the catcher's direct throw retires a runner the play stands, if not, the ball is dead and all runners must return to their time of throw bases.

It is also umpire's interference when an umpire is struck by a fair batted ball before it touches or passes near an infielder other than the pitcher
Pitcher
In baseball, the pitcher is the player who throwsthe baseball from the pitcher's mound toward the catcher to begin each play, with the goal of retiring a batter, who attempts to either make contact with the pitched ball or draw a walk. In the numbering system used to record defensive plays, the...

. This can occur either because an umpire is inside the diamond or because the ball crosses 1st or 3rd base in fair territory then hooks or slices foul into the umpire positioned just outside the line behind the bag. In this case, the ball is dead, the batter is awarded first base, and all other runners advance only if forced. A common example is when a batter hits a fair ball down the first base line so hard that the first base umpire can't avoid it. Even though the hit would have surely been a bases clearing double or triple without the interference, it is only a single and runners advance no more than one base. This happened in the 1989 All-Star Game
1989 Major League Baseball All-Star Game
The 1989 Major League Baseball All-Star Game was the 60th playing of the midsummer classic between the all-stars of the American League and National League , the two leagues comprising Major League Baseball. The game was held on July 11, 1989 at Anaheim Stadium in Anaheim, California, the home of...

 when the Pittsburgh Pirates
Pittsburgh Pirates
The Pittsburgh Pirates are a Major League Baseball club based in Pittsburgh, Pennsylvania. They play in the Central Division of the National League, and are five-time World Series Champions...

' Bobby Bonilla
Bobby Bonilla
Roberto Martin Antonio "Bobby" Bonilla is a former player in Major League Baseball who played from 1986 to 2001. Known in his playing days as "Bobby Bo," Bonilla is of Puerto Rican descent.-Playing career:...

 led off the 9th with a scorching grounder that would have been an easy double, but it hit First Base Umpire Bob Engel in the legs as he tried to jump out of the way. Instead of being in scoring position down 5-3, Bonilla was forced out at 2nd the next play and the game ended on a double play.

Catcher's interference

Catcher's interference is called when the catcher
Catcher
Catcher is a position for a baseball or softball player. When a batter takes his turn to hit, the catcher crouches behind home plate, in front of the umpire, and receives the ball from the pitcher. This is a catcher's primary duty, but he is also called upon to master many other skills in order to...

 physically hinders the batter's opportunity to legally swing at a pitched ball. This occurs most often when a catcher squats too close to home plate, so that the batter's bat touches the catcher's glove as the batter swings. This is most likely to happen on attempted steals where the catcher is anxious to catch the ball as soon as possible and may move his entire body or glove forward a bit.

In this case, play continues, and after continuous playing action ceases, the umpire will call time. The penalty here is that the batter is awarded first base, any runner attempting to steal
Stolen base
In baseball, a stolen base occurs when a baserunner successfully advances to the next base while the pitcher is delivering the ball to home plate...

 is awarded that base, and all other runners advance only if forced. Additionally, the catcher is charged with an error
Error (baseball)
In baseball statistics, an error is the act, in the judgment of the official scorer, of a fielder misplaying a ball in a manner that allows a batter or baserunner to reach one or more additional bases, when such an advance would have been prevented given ordinary effort by the fielder.The term ...

 (although the batter is not charged with an at-bat). However, if the actual playing result is more advantageous than the penalty, the offense may elect to ignore the infraction (e.g., if the batter-runner reaches first safely and all other runners advance at least one base, catcher's interference is ignored by rule).

Under high school (NFHS) rules only, catcher's interference is instead called catcher's obstruction.

Spectator interference

When a spectator or other person not associated with one of the teams (including such staff as bat boys or ball girls) alters play in progress, it is spectator interference, colloquially called fan interference. It is worth noting that the latter is also (incorrectly) used to refer to fan obstruction - for instance a spectator running onto the field and tackling a baserunner. The ball becomes dead, and the umpire will award any bases or charge any outs that, in his judgment, would have occurred without the interference.

Such interference often occurs when a spectator in the first row of seats reaches onto the field to attempt to grab a fair or foul fly ball. If the umpire judges that the fielder could have caught the ball over the field (i.e., the ball would have not crossed over the plane of the wall), he will rule the batter out on spectator interference. Also, the spectator who commits interference is usually ejected from the stadium. Note that spectators are allowed to catch a ball that is in play when the ball has broken the plane of the spectators' side of the wall, even if in doing so they interfere with a player who is also trying to catch the ball. In the 2003 NLCS, Steve Bartman
Steve Bartman
The Steve Bartman incident occurred during a Major League Baseball playoff game between the Chicago Cubs and the Florida Marlins on October 14, 2003, at Wrigley Field in Chicago....

 famously hindered Moisés Alou
Moisés Alou
Moisés Rojas Alou |Spanish:]] ; born July 3, 1966 in Atlanta, Georgia) is a former American outfielder in Major League Baseball who played for 17 seasons in the National League. In 1,942 career games, Alou had a batting average of .303 with 2,134 hits, 421 doubles, 332 home runs, and 1,287 runs...

 from catching a foul ball, but because the ball had already broken the plane of the wall, it would have landed in the stands and Alou would have had to reach over the wall to get it, no interference was called. The area where both fielders and spectators are legally allowed to catch the ball is colloquially called no man's land.

Umpires typically grab their wrist above their head to signal that spectator interference has occurred.

Cases of possible spectator interference

  • On October 9, 1996, Jeffrey Maier
    Jeffrey Maier
    Jeffrey Maier is an American baseball fan best known for an incident in which he was involved as a twelve-year-old at a baseball game, when he deflected a batted ball in-play into the stands during Game 1 of the 1996 American League Championship Series between the New York Yankees and the...

     became well-loved in New York but hated in Baltimore over spectator interference that was not called by the umpire. In the eighth inning of Game 1 of the American League Championship Series
    American League Championship Series
    In Major League Baseball, the American League Championship Series , played in October, is a round in the postseason that determines the winner of the American League pennant...

    , with the Yankees trailing 4–3, Derek Jeter
    Derek Jeter
    Derek Sanderson Jeter is an American baseball shortstop who has played 17 years in Major League Baseball for the New York Yankees. A twelve-time All-Star and five-time World Series champion, Jeter's clubhouse presence, on-field leadership, hitting ability, and baserunning have made him a central...

    , the Yankee shortstop, hit a fly to the right field wall. Oriole right fielder Tony Tarasco
    Tony Tarasco
    Anthony Giacinto Tarasco is a former Major League Baseball outfielder for the Atlanta Braves, Montreal Expos, Baltimore Orioles, Cincinnati Reds, New York Yankees, and New York Mets from 1993 to 2002....

     backtracked and positioned himself to catch Jeter's fly ball just short of the wall. Maier, a 12-year-old spectator seated in the bleachers, reached out to catch the ball, and deflected it away from Tarasco and over the fence. Umpire Rich Garcia ruled the play a home run rather than calling Jeter out on spectator interference or awarding him a double (Garcia later said he believed the ball was uncatchable, but it was in the park and thus spectator interference). Maier's interference and Garcia's call resulted in a game-tying home run for Jeter. The Yankees won the game in extra innings and prevailed in the series in five games.

  • On July 6, 2010, the Seattle Mariners
    Seattle Mariners
    The Seattle Mariners are a professional baseball team based in Seattle, Washington. Enfranchised in , the Mariners are a member of the Western Division of Major League Baseball's American League. Safeco Field has been the Mariners' home ballpark since July...

     trailed the Kansas City Royals
    Kansas City Royals
    The Kansas City Royals are a Major League Baseball team based in Kansas City, Missouri. The Royals are a member of the Central Division of Major League Baseball's American League. From 1973 to the present, the Royals have played in Kauffman Stadium...

     3–2 in the 8th inning of a game. With runner Ichiro Suzuki
    Ichiro Suzuki
    , usually known simply as is a Major League Baseball right fielder for the Seattle Mariners. Ichiro has established a number of batting records, including the sport's single-season record for hits with 262...

     on first base for the Mariners, Mariners designated hitter
    Designated hitter
    In baseball, the designated hitter rule is the common name for Major League Baseball Rule 6.10, an official position adopted by the American League in 1973 that allows teams to designate a player, known as the designated hitter , to bat in place of the pitcher each time he would otherwise come to...

     Russell Branyan
    Russell Branyan
    Russell Oles Branyan is a Major League Baseball first baseman. He throws right-handed, bats left-handed, and primarily plays first base, but is capable of playing third base and the outfield. Branyan began his professional career in the Cleveland Indians minor league system...

     hit a double down the right field line. As Royals outfielder David DeJesus
    David DeJesus
    David Christopher DeJesus is an American professional baseball outfielder for the Chicago Cubs of Major League Baseball.-Career:DeJesus was raised in Manalapan Township, New Jersey, and played high school baseball at Manalapan High School. He was drafted out of high school by the New York Mets in...

     attempted to make a play on the ball, a young fan reached onto the field and picked up the ball. The play was ruled a ground rule double
    Ground rule double
    In baseball, a ground rule double is an award of two bases from the time of pitch to all baserunners including the batter-runner as a result of the ball leaving play after being hit fairly and leaving the field under a condition of the ground rules in effect at the field where the game is being...

    , and the umpires ruled that Branyan would take second base and that Ichiro would take third base, denying him a potential opportunity to score on the play. The Royals went on to win, 3–2.

  • On October 19, 2010, in the second inning of Game 4 of the American League Championship Series
    American League Championship Series
    In Major League Baseball, the American League Championship Series , played in October, is a round in the postseason that determines the winner of the American League pennant...

    , with the score tied 0-0, Yankees player Robinson Cano
    Robinson Canó
    Robinson José Canó Mercedes is a Dominican baseball player who currently plays as a second baseman for the New York Yankees.-Family and early life:...

     hit a fly to the right field wall. Rangers right fielder Nelson Cruz backtracked and positioned himself to jump in the air and attempt to catch Cano's fly ball at the wall. Macchirole, a 20-year-old spectator seated in the bleachers, reached out to catch the ball, and in doing so, made contact with the glove of Cruz, ending his upward momentum, and ensuring that Cruz would not catch the ball, that did reach the seats. Right Field Umpire Jim Reynolds
    Jim Reynolds
    James Norris Reynolds IV is a Major League Baseball umpire. He joined the major league staff in and wears uniform number 77....

     ruled the play a home run rather than calling for Instant Replay review to determine whether spectator interference had occurred as specified by MLB's new rule regarding Instant Replay
    Instant Replay
    Instant replay is the process of replaying previously occurred events through the use of video technology.Instant replay may also refer to:*Instant replay in American football*Instant Replay , 1969...

    . The potential interference and umpire's call resulted in a solo home run for Cano, the Yankees taking a 1-0 lead at the time.

  • On September 4, 2011, Hunter Pence
    Hunter Pence
    Hunter Andrew Pence is a Major League Baseball outfielder with the Philadelphia Phillies. Pence stands tall and weighs . He bats and throws right-handed.-Early life:...

     of the Philadelphia Phillies hit a fly ball to deep right field. Originally ruled a live ball, instant replay showed Marlins right fielder Bryan Petersen
    Bryan Petersen
    Bryan E. Petersen is a Major League Baseball outfielder for the Miami Marlins.-Professional career:...

     was interfered with by multiple fans during his opportunity to catch a ball, under Rule 2.00 INTERFERENCE (d)(1) and (2). After instant replay review, first base umpire and crew chief Joe West ruled Pence out under the provisions of spectator interference, Rule 3.16, and sent Phillies baserunner Ryan Howard
    Ryan Howard
    Ryan James Howard is a Major League Baseball first baseman for the Philadelphia Phillies. Nicknamed "The Big Piece", Howard stands and weighs . He bats and throws left-handed....

     back to first base. Phillies Manager Charlie Manuel
    Charlie Manuel
    Charles Fuqua Manuel, Jr. is a former Major League Baseball and Nippon Professional Baseball outfielder and current Major League Baseball manager of the Philadelphia Phillies...

     was ejected and elected to play the game under protest. On September 7, 2011, MLB VP of Baseball Operations Joe Torre
    Joe Torre
    Joseph Paul Torre is a former American professional baseball player and manager who currently serves as Major League Baseball’s Executive Vice President of Baseball Operations. A nine-time All-Star, he played in Major League Baseball as a catcher, first baseman and a third baseman for the...

     denied the first ever protest associated with authorized instant replay usage.

Weak interference

Several situations arise in baseball that are considered, by logical extension of the rules, not to be severe enough to warrant an interference call, but nevertheless require enforcement to maintain fair play. These are known to umpires as weak interference, though this term itself does not appear in the rules. These well-defined incidents are not severe enough to be considered offensive interference. When weak interference occurs, the ball is usually called dead, but no further penalty is assessed against a baserunner or batter.

Weak interference is called when:
  • A catcher touches the batter or his bat before a pitch
  • A foreign object or animal flies between home plate and the pitcher before or during a pitch
  • A non-participant or member of the offensive team grasps a live ball
    Live ball (baseball)
    In baseball, when the ball is alive , the game can proceed. The pitcher may pitch the ball , the batter may attempt to hit such a pitch, baserunners may attempt to advance at their own risk, and the defense may attempt to put the batter or baserunners out.-Definition:The ball becomes live when the...

    , but no play is affected and no runners attempt to advance
  • The pitcher stops his pitching motion because the batter induced him to do so, such as by asking for time.


Cases of weak interference

On March 24, 2001 during the 7th inning of a spring training
Spring training
In Major League Baseball, spring training is a series of practices and exhibition games preceding the start of the regular season. Spring training allows new players to try out for roster and position spots, and gives existing team players practice time prior to competitive play...

 game against the San Francisco Giants
San Francisco Giants
The San Francisco Giants are a Major League Baseball team based in San Francisco, California, playing in the National League West Division....

, Randy Johnson
Randy Johnson
Randall David Johnson , nicknamed "The Big Unit", is a former Major League Baseball left-handed pitcher. During a 22-year career, he pitched for six different teams....

 of the Arizona Diamondbacks
Arizona Diamondbacks
The Arizona Diamondbacks are a professional baseball team based in Phoenix. They play in the West Division of Major League Baseball's National League. From 1998 to the present, they have played in Chase Field...

 threw a fastball that struck and killed a dove
Dove
Pigeons and doves constitute the bird family Columbidae within the order Columbiformes, which include some 300 species of near passerines. In general terms "dove" and "pigeon" are used somewhat interchangeably...

 that was flying between him and the batter. The bird flew over catcher Rod Barajas
Rod Barajas
Rodrigo Richard Barajas is a Mexican American professional baseball catcher for the Pittsburgh Pirates of Major League Baseball. He came up to the majors with the Arizona Diamondbacks in...

's head and landed amid a "sea of feathers". The ball was called dead, as was the dove, and the incident was ruled "no pitch".

Common misconceptions

When a fielder hinders a baserunner, the situation is called obstruction
Obstruction (baseball)
In baseball, when a fielder illegally hinders a baserunner, the fielder is guilty of obstruction.Baserunners are generally permitted the free privilege to run from base to base without being physically blocked or hindered by a fielder...

, not interference. Baseball commentators will often mistakenly refer to obstruction as interference.

Not all physical contact in baseball is interference. Accidental contact that has little or no effect on play will usually be ignored; physical contact must result in an advantageous situation for the offense to be considered offensive interference. Nor must physical contact occur for interference to be called. A runner may interfere with a fielder simply by hindering the fielders ability to attempt to make a play on a batted ball.

If a base runner is hit by a fair-batted ball while standing on a base, the runner is out, unless the ball has already passed an infielder OR it’s a declared infield fly. The base is not a sanctuary.

Being in contact with a base may protect a baserunner from being called out for interference in the case of a fielder attempting to field a batted ball.

Per MLB rules:

"If a runner has contact with a legally occupied base when he hinders a fielder attempting to make a play on a batted ball, the runner shall not be called out unless, in the umpire's judgment, such hindrance, whether it occurs in fair or foul territory, is intentional. If the umpire declares the hindrance intentional, the following penalty shall apply: With less than two outs, the umpire shall declare both the runner and batter out. With two out, the umpire shall declare the batter out."

Per Little League rules::

7.08—Any runner is out when -

(b) intentionally interferes with a thrown ball; or hinders a fielder attempting to make a play on a batted ball; (NOTE: A runner who is adjudged to have hindered a fielder who is attempting to make a play on a batted ball is out whether it was intentional or not);

INSTRUCTOR COMMENTS:

If, however, the runner has contact with a legally occupied base when he/she hinders the fielder, he/she shall not be called out unless, in the umpire’s judgment, such hindrance, whether it occurs on fair or foul territory is intentional. If the umpire declares the hindrance intentional, the following penalty shall apply: With less than two out, the umpire shall declare both the runner and batter out. With two out, the umpire shall declare the batter out.

For the most part, intent to interfere is not necessary for interference to be called; however, a runner cannot be called for interference with a throw or a fielder making a throw unless such a hindrance was indeed intentional.
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