Champions
World Series: Philadelphia Athletics over Chicago Cubs (4-1)
Awards and honors
League Award
Rogers Hornsby, Chicago Cubs, 2B
Statistical leaders
Major league baseball final standings
American League final standings
National League final standings
Negro leagues final standings
Negro National League final standings
† Nashville was not in the league but their games counted in the standings.
American Negro League final standings
Baltimore was awarded the Pennant as they reportedly won both halves of the season.
Events
January–April
January 22 – The New York Yankees announce they will put numbers on the backs of their uniforms, becoming the first baseball team to start continuous use of the numbers. The first numbers are based on positions in the batting order; thus, Babe Ruth will wear number 3 and Lou Gehrig number 4. In a few weeks, the Cleveland Indians announce that they, too, will put numbers on the uniforms. By , all American League teams will use them. It will be before all National League players are numbered. January 29 – James R. Price, secretary of the Boston Red Sox, commits suicide at Fenway Park. February 28 – The Chicago White Sox trade Bibb Falk to the Cleveland Indians for Chick Autry. April 16 – On opening day, Hall of Famer Earl Averill makes his major league debut in the Cleveland Indians' 5-4 eleven inning victory over the Detroit Tigers. The St. Louis Browns defeat the Chicago White Sox, 3–1; the Pittsburgh Pirates defeat the Chicago Cubs, 4–3, and the St. Louis Cardinals defeat the Cincinnati Reds 5–2. April 16 – Charlie Gelbert makes his MLB debut for the St. Louis Cardinals. April 17 – The Detroit Tigers rout the Cleveland Indians 15–3. Tigers outfielder Harry Heilmann drove in five runs. April 18 – The Cincinnati Reds trade Val Picinich to the Brooklyn Robins for Rube Ehrhardt and Johnny Gooch. April 18 – Roy Johnson makes his MLB debut for the Detroit Tigers. Johnson lead the league in doubles with 45 in his rookie season. April 19 – Hall of famer Rick Ferrell makes his major league debut in the St. Louis Browns' 5–4 loss to the Chicago White Sox. April 27 – Brooklyn Robins relief pitcher Clise Dudley is the first player ever to hit a home run off the first pitch he sees. Regardless of the achievement, Brooklyn loses 8–3 to the Philadelphia Phillies.