Champions
Major League Baseball
World Series: Brooklyn Dodgers over New York Yankees (4-3); Johnny Podres, MVP
All-Star Game, July 12 at County Stadium: National League, 6-5 (12 innings)
Other champions
College World Series: Wake Forest University
Japan Series: Yomiuri Giants over Nankai Hawks (4-3) Little League World Series: Morrisville, Pennsylvania Pan American Games: Dominican Republic over USA Winter Leagues 1955 Caribbean Series: Cangrejeros de Santurce Cuban League: Alacranes del Almendares Dominican Republic League: Leones del Escogido Mexican Pacific League: Venados de Mazatlán Panamanian League: Carta Vieja Yankees Puerto Rican League: Cangrejeros de Santurce Venezuelan League: Navegantes del Magallanes
Awards and honors
Baseball Hall of Fame
Frank Baker
Joe DiMaggio
Ted Lyons
Dazzy Vance
Gabby Hartnett
Ray Schalk
Most Valuable Player
American League: Yogi Berra, New York Yankees
National League: Roy Campanella, Brooklyn Dodgers
Rookie of the Year
American League: Herb Score, Cleveland Indians
National League: Bill Virdon, St. Louis Cardinals
MLB statistical leaders
Major league baseball final standings
American League final standings
National League final standings
Events
Before the Athletics arrive in town, the Kansas City Monarchs move their base of operations to Grand Rapids, Michigan. They retain the name "Kansas City Monarchs" and continue in the Negro American League as a barnstorming team.
January
January 24 – In an effort to speed up the game, Major League Baseball announces a new rule which requires a pitcher to deliver the ball within 20 seconds after taking a pitching position.
February
February 17 – - The Baltimore Orioles obtained pitcher Erv Palica from the Brooklyn Dodgers in exchange for first baseman Frank Kellert and cash considerations. This replaces the previous Preacher Roe deal, which fell through when the Brooklyn pitcher announced his retirement. February 28 – The National League fines the Milwaukee Braves $500 for opening their spring training camp before the official March 1 date.
March
March 7 – Commissioner Ford Frick advocated for the return of the spitball, arguing that it is "a great pitch and one of the easiest to throw. There was nothing dangerous about it." The spitball was banned following the 1920 season. Despite the Commissioner's enthusiasm, the pitch remained illegal.
April
April 12 – After a big civic parade, the Athletics open their first season in Kansas City with a win over the Detroit Tigers, 6–2, before a crowd of 32,844. April 14 – Elston Howard becomes the first African-American to wear the New York Yankees uniform. Howard singles in his first-at-bat, against the Boston Red Sox, as the Yankees win 8–4. April 23: The Chicago White Sox tallied a franchise record 29 runs and 29 hits against the host Kansas City Athletics, including seven home runs, in a 29–6 ripping. Sherm Lollar was 5-for-6 with a pair of home runs and five RBI, and became the only player in the decade to get two hits in one inning twice in the same game (2nd and 6th innings). Chico Carrasquel hit 5-for-6, and Bob Nieman paced the attack with two homers and seven RBI. Walt Dropo added a homer and seven RBI, while pitcher Jack Harshman and Minnie Miñoso also homered. Carrasquel and Miñoso each scored five runs. Kansas City had homers from Vic Power and Bill Renna. Bobby Shantz was the losing pitcher.
May
May 12 – Sam Jones of the Chicago Cubs no-hits the Pittsburgh Pirates, 4–0, becoming the first African American to pitch a no-hitter in the Major Leagues. In the ninth inning Jones walks the bases full and then strikes out Dick Groat, Roberto Clemente and Frank Thomas in a row to preserve his victory. It is also the first no-hitter at Wrigley Field in 38 years. Only 2,918 fans are on hand to witness the double milestone. May 13 – At Yankee Stadium, Mickey Mantle hits home runs from both sides of the plate for the first time in his major league career. The New York Yankees slugger finishes the game with three home runs – two left-handed and one right-handed, while driving in all of his team's runs in a 5–2 victory over the Detroit Tigers. Whitey Ford is the winning pitcher and Steve Gromek takes the loss.
June
June 1 – Duke Snider hit three home runs at Ebbets Field, helping the Brooklyn Dodgers to an 11–8 victory over the Milwaukee Braves. Pee Wee Reese, Jackie Robinson and Roy Campanella also belted solo homers for the Dodgers, to set a franchise record with six home runs in a single game.