Knuckle curve
Encyclopedia
In Major League
Major League Baseball
Major League Baseball is the highest level of professional baseball in the United States and Canada, consisting of teams that play in the National League and the American League...

 history, the term knuckle curve has been used to describe three entirely different pitches.

The first, more common pitch called the knuckle curve is really a standard curveball
Curveball
The curveball is a type of pitch in baseball thrown with a characteristic grip and hand movement that imparts forward spin to the ball causing it to dive in a downward path as it approaches the plate. Its close relatives are the slider and the slurve. The "curve" of the ball varies from pitcher to...

, thrown with one or more of the index or mean fingers bent. According to practitioners, this gives them a better grip on the ball and allows for tighter spin and greater movement. In all other respects, this knuckle curve is identical to the standard curveball. This version of the knuckle curve is currently used by Major League pitchers Cliff Lee
Cliff Lee
Clifton Phifer "Cliff" Lee is a Major League Baseball left-handed starting pitcher for the Philadelphia Phillies. Lee has also played for the Cleveland Indians, the Seattle Mariners, and the Texas Rangers....

, Dan Haren
Dan Haren
Daniel John Haren is a Major League Baseball starting pitcher for the Los Angeles Angels of Anaheim.- High-school and college career :...

, J. P. Howell, Brandon Morrow
Brandon Morrow
Brandon John Morrow is an American professional baseball pitcher with the Toronto Blue Jays of Major League Baseball....

, Phil Hughes, A.J. Burnett and Jonathan Sanchez
Jonathan Sanchez
Jonathan O. Sánchez is a Puerto Rican Major League Baseball left-handed starting pitcher for the Kansas City Royals....

. Mike Mussina
Mike Mussina
Michael Cole Mussina , nicknamed Moose, is a former Major League Baseball right-handed starting pitcher. He played for the Baltimore Orioles and the New York Yankees ....

 was well known for his incorporation of the pitch into his repertoire. Justin Verlander
Justin Verlander
Justin Brooks Verlander is an American professional baseball pitcher with the Detroit Tigers of Major League Baseball....

 formerly threw a knuckle curve but was forced to abandon the pitch due to problems with blisters http://www.freep.com/apps/pbcs.dll/article?AID=/20060501/SPORTS02/605010394/1050. The knuckle curve is usually called the spike curve by MLB players and coaches because the pitch is nothing like a knuckleball
Knuckleball
A knuckleball is a baseball pitch with an erratic, unpredictable motion. The pitch is thrown so as to minimize the spin of the ball in flight. This causes vortices over the stitched seams of the baseball during its trajectory, which in turn can cause the pitch to change direction—and even...

.

The second type of knuckle curve is a breaking ball
Breaking ball
In baseball, a breaking ball is a pitch that does not travel straight like a fastball as it approaches the batter. A pitcher who uses primarily breaking ball pitches is often referred to as a junkballer. A breaking ball will have some sideways or downward motion on it...

 that is thrown with a grip similar to the knuckleball. Unlike a knuckleball, which spins very little, a knuckle curve spins like a normal curveball because the pitcher's index and middle fingers push the top of the ball into a downward curve at the moment of release. Since only two fingers produce the spin, however, a knuckle curve does not spin as fast as a curveball, meaning the break is less sharp and predictable. Because the knuckle curve can be thrown with the same general motion as a fastball
Fastball
The fastball is the most common type of pitch in baseball. Some "power pitchers," such as Nolan Ryan and Roger Clemens, have thrown it at speeds of 95–106 mph and up to 108.1 mph , relying purely on speed to prevent the ball from being hit...

, it is more deceptive than a normal curveball. This kind of knuckle-curve is rare – it is easier to control than a standard knuckleball, but still difficult to master. The most famous practitioners of this type of knuckle curve are Burt 'Happy' Hooton
Burt Hooton
Burt Carlton Hooton , nicknamed "Happy" , is a coach and former right-handed starting pitcher in Major League Baseball...

, who pitched for the Chicago Cubs
Chicago Cubs
The Chicago Cubs are a professional baseball team located in Chicago, Illinois. They are members of the Central Division of Major League Baseball's National League. They are one of two Major League clubs based in Chicago . The Cubs are also one of the two remaining charter members of the National...

 and the Los Angeles Dodgers
Los Angeles Dodgers
The Los Angeles Dodgers are a professional baseball team based in Los Angeles, California. The Dodgers are members of Major League Baseball's National League West Division. Established in 1883, the team originated in Brooklyn, New York, where it was known by a number of nicknames before becoming...

 from the mid 1970s to mid 1980s, and current New York Mets
New York Mets
The New York Mets are a professional baseball team based in the borough of Queens in New York City, New York. They belong to Major League Baseball's National League East Division. One of baseball's first expansion teams, the Mets were founded in 1962 to replace New York's departed National League...

 reliever Jason Isringhausen
Jason Isringhausen
Jason Derik Isringhausen is a Major League Baseball relief pitcher.-New York Mets:Isringhausen was chosen as a draft-and-follow prospect by the New York Mets in the 44th round of the 1991 Major League Baseball Draft...

.

The third type of knuckle curve was thrown by Dave Stenhouse
Dave Stenhouse
David Rotchford Stenhouse is a former pitcher in Major League Baseball who played for the Washington Senators from to . Stenhouse batted and threw right-handed. He is the father of outfielder Mike Stenhouse....

 in the 1960s. Stenhouse's knuckle curve was thrown like a fastball but with a knuckleball grip. Stenhouse discovered that this pitch had excellent movement, and when he came to the majors, he utilized it as a breaking pitch. This pitch may have been the same as the knuckleball thrown by Jesse Haines
Jesse Haines
Jesse Joseph "Pop" Haines, was a right-handed Major League Baseball pitcher and knuckleballer. He played briefly in 1918, then from 1920 to 1937.-Career:...

 and Freddie Fitzsimmons
Freddie Fitzsimmons
Frederick Landis Fitzsimmons , nicknamed "Fat Freddie," was an American right-handed pitcher, manager and coach in Major League Baseball who played from 1925 to 1943 with the New York Giants and Brooklyn Dodgers...

. The pitch would be perfected by Chicago White Sox
Chicago White Sox
The Chicago White Sox are a Major League Baseball team located in Chicago, Illinois.The White Sox play in the American League's Central Division. Since , the White Sox have played in U.S. Cellular Field, which was originally called New Comiskey Park and nicknamed The Cell by local fans...

 legend Hoyt Wilhelm
Hoyt Wilhelm
James Hoyt Wilhelm was an American Major League Baseball pitcher. He was elected to the Baseball Hall of Fame in 1985....

during the later stages of his career, after flirting with it for most of his time in the majors.
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