Offseason

• October 20, 1955: Harry Walker
  Harry Walker
  Harry William Walker, known to baseball fans of the middle 20th century as "Harry the Hat" , was an American baseball player, manager and coach.-Early life and family:...
  
   was released by the Cardinals.
• November 27, 1955: Ed Mayer
  Ed Mayer (pitcher)
  Edwin David Mayer is a former professional baseball pitcher. A left-handed relief pitcher, Mayer played parts of two seasons in Major League Baseball for the Chicago Cubs in 1957 and 1958. He also pitched in the minor leagues from 1952 to 1959...
  
   was drafted by the Cardinals from the 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"...
  
   in the 1955 minor league draft.
• November 27, 1955: Billy Muffett
  Billy Muffett
  Billy Arnold Muffett was an American professional baseball player who pitched in the Major Leagues from 1957-1962. He would play for the St. Louis Cardinals, San Francisco Giants, and Boston Red Sox. In his playing days, he stood 6"1" tall, weighed 198 pounds , and threw and batted right-handed...
  
   was drafted by the Cardinals from 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...
  
   in the 1955 rule 5 draft
  Rule 5 draft
  The Rule 5 draft is a Major League Baseball player draft that occurs each year in December, at the annual Winter Meeting of general managers. The Rule 5 draft aims to prevent teams from stockpiling too many young players on their minor league affiliate teams when other teams would be willing to...
  
  .
• January 31, 1956: Brooks Lawrence
  Brooks Lawrence
  Brooks Ulysses Lawrence was a Major League Baseball All-Star pitcher for the St. Louis Cardinals , Cincinnati Redlegs , and Cincinnati Reds ....
  
   and Sonny Senerchia were traded by the Cardinals to the Cincinnati Redlegs
  Cincinnati Reds
  The Cincinnati Reds are a Major League Baseball team based in Cincinnati, Ohio. They are members of the National League Central Division. The club was established in 1882 as a charter member of the American Association and joined the National League in 1890....
  
   for Jackie Collum
  Jackie Collum
  John Dean Collum was a pitcher in Major League Baseball who played for eight different teams between the and seasons. Listed at 5' 7", 163 lb., Collum batted and threw left-handed. He was born in Victor, Iowa....
  
  .
• March 30, 1956: Pete Whisenant
  Pete Whisenant
  Thomas Peter Whisenant was an American outfielder and coach in Major League Baseball. Born in Asheville, North Carolina, Whisenant stood 6'2" , weighed 200 pounds , and threw and batted right-handed....
  
   was traded by the Cardinals to 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...
  
   for Hank Sauer
  Hank Sauer
  Henry John "Hank" Sauer was a left fielder in Major League Baseball. From 1941 through 1959, Sauer played for the Cincinnati Reds , Chicago Cubs , St. Louis Cardinals , New York Giants and San Francisco Giants...
  
  .

Notable transactions

• May 14, 1956: Solly Hemus
  Solly Hemus
  Solomon Joseph Hemus is a retired infielder, manager and coach in American Major League Baseball.As a player with the St. Louis Cardinals and Philadelphia Phillies, Hemus was primarily a shortstop, although he also saw significant time as a second baseman. He compiled a lifetime batting average...
  
   was traded by the Cardinals to the Philadelphia Phillies
  Philadelphia Phillies
  The Philadelphia Phillies are a Major League Baseball team. They are the oldest continuous, one-name, one-city franchise in all of professional American sports, dating to 1883. The Phillies are a member of the Eastern Division of Major League Baseball's National League...
  
   for Bobby Morgan
  Bobby Morgan
  Robert Morris Morgan was an infielder in Major League Baseball. He played from 1950 to 1958 with the Brooklyn Dodgers, Philadelphia Phillies, St. Louis Cardinals and Chicago Cubs. He played in the 1952 and 1953 World Series for the Dodgers....
  
  .
• May 17, 1956: Bill Virdon
  Bill Virdon
  William Charles Virdon is a former outfielder, manager and coach in Major League Baseball. A premier defensive outfielder during his playing days as a center fielder for the St...
  
   was traded by the Cardinals to 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...
  
   for Dick Littlefield
  Dick Littlefield
  Richard Bernard "Dick" Littlefield was an American left-handed pitcher in Major League Baseball who played for nine teams between 1950 and 1958.Born in Detroit, Michigan, he died there at age 71....
  
   and Bobby Del Greco
  Bobby Del Greco
  Robert George Del Greco was an Outfielder for the Pittsburgh Pirates , St. Louis Cardinals , Chicago Cubs , New York Yankees , Philadelphia Phillies and Kansas City Athletics .Del Greco grew up in Pittsburgh's Hill District and was signed by the hometown Pirates...
  
  .
• May 28, 1956: The Cardinals traded cash and a player to be named later to the Pittsburgh Pirates for Toby Atwell
  Toby Atwell
  Maurice Dailey "Toby" Atwell was a catcher in Major League Baseball who played for the Chicago Cubs , Pittsburgh Pirates and Milwaukee Braves . Atwell batted left-handed and threw right-handed...
  
  . The Cardinals completed the deal by sending Dick Rand
  Dick Rand
  Richard Hilton Rand was an American Major League Baseball catcher. He played all or part of three seasons, , , and , for the St. Louis Cardinals and Pittsburgh Pirates.-Sources:...
  
   to the Pirates on October 14.
• June 14, 1956: Red Schoendienst
  Red Schoendienst
  Albert Fred "Red" Schoendienst is an American Major League Baseball coach, former player and manager, and 10-time All-star. After a 19-year playing career with the St...
  
  , Jackie Brandt
  Jackie Brandt
  John George Brandt Jr. is a former Major League Baseball outfielder. He was signed by the St. Louis Cardinals as an amateur free agent before the 1953 season, and played for the Cardinals , New York Giants , San Francisco Giants , Baltimore Orioles , Philadelphia Phillies , and Houston Astros...
  
  , Dick Littlefield, Bill Sarni
  Bill Sarni
  William Florine Sarni was an American professional baseball player who played as a catcher in the Major Leagues. A native of Los Angeles, California, he played for the St...
  
  , and a player to be named later were traded by the Cardinals to the New York 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....
  
   for Alvin Dark
  Alvin Dark
  Alvin Ralph Dark , nicknamed "Blackie" and "The Swamp Fox", is a former shortstop and manager in Major League Baseball who played for five National League teams from 1946 to 1960. Named the major leagues' Rookie of the Year with the Boston Braves when he batted .322...
  
  , Ray Katt
  Ray Katt
  Raymond Frederick Katt was an American catcher and coach in Major League Baseball during the 1950s, and later the longtime and highly successful head baseball coach of Texas Lutheran University. A lifelong resident of New Braunfels, Texas, Katt stood 6'2" tall, weighed 200 pounds , and threw and...
  
  , Don Liddle
  Don Liddle
  Donald Eugene Liddle was an American left-handed pitcher in professional baseball who played four seasons in the Major Leagues for the Milwaukee Braves, New York Giants and St. Louis Cardinals from through...
  
  , and Whitey Lockman
  Whitey Lockman
  Carroll Walter "Whitey" Lockman was a player, coach, manager and front office executive in American Major League Baseball.-Role in miraculous 1951 comeback:...
  
  . The Cardinals completed the deal by sending Gordon Jones
  Gordon Jones (baseball)
  Gordon Bassett Jones was an American Major League Baseball pitcher. The , right-hander was a native of Portland, Oregon. He was signed by the St...
  
   to the Giants on October 1.

Roster

Starters by position

Other batters

Starting pitchers

Other pitchers

Relief pitchers

Farm system