- The Tigers cop their first American League flag since 1909.
- The Cards take the National League flag by two games over the Giants with a club that's known as the "Gashouse Gang."
- The Cards take the 1934 World Series in seven games under manager Frankie Frisch.
Clark Griffith, manager of
the Senators, sent his
son-in-law, Joe Cronin,
to the Red Sox in 1934.
- Clark Griffith of the Senators sends his son-in-law, Joe Cronin, to the Red Sox for Lyn Lary and $250,000.
- In game seven of the 1934 World Series, Ducky Medwick's hard slide into Tiger third baseman Marv Owen triggers a near riot among Detroit fans.
- The Dean brothers, Dizzy and Paul, win two games each in the 1934 World Series.
- Dizzy Dean is selected the National League MVP.
- Detroit player/manager Mickey Cochrane is the American League MVP.
- Lou Gehrig wins the Triple Crown in the American League, batting .363 with 49 homers and 165 RBI.
- Paul Waner tops the National League in batting at .362.
- Dizzy Dean becomes the last National League hurler to win 30 games, as he wins 30 games exactly.
- The Dean brothers win a sibling record 49 games for the Cards.
- Yankee Lefty Gomez leads the American League in wins (26), win pct. (.839), Ks (158), and ERA (2,33), and ties in shutouts (six).
- Carl Hubbell's 2.30 ERA is the best in the majors.
- In the 1934 All-Star Game, Hubbell fans Babe Ruth, Gehrig, Jimmie Foxx, Al Simmons, and Joe Cronin consecutively.
- The American League wins the 1934 All-Star Game 9-7.
- Babe Ruth hits his 700th career homer.
- The Yankees obtain Joe DiMaggio from the Pacific Coast League's San Francisco Seals for $25,000 and four players.
- Lou Gehrig ties an American League record by leading the loop in RBI for a fifth time.
- The 1934 World Champion Cardinals draw only 350,000 fans in home attendance.
- Hal Trosky of Cleveland collects 374 total bases, a rookie record.
- On Sept. 21, the Deans take turns shutting out the Dodgers in a twinbill.
- A few members of the Reds fly to a game in Chicago; they were the first major league teammates to travel together by air.
- The Yankees release two future Hall of Famers, Herb Pennock and Joe Sewell, on the same day.
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