1938 in sports

Baseball

World Series: New York Yankees defeat the Chicago Cubs, 4-0.
Hall of Fame election: Continuing toward the goal of 10 initial inductees at the 1939 opening of the Hall, voters select Grover Cleveland Alexander. A special committee selects organizer Alexander Cartwright and promoter Henry Chadwick; selections of 19th century players are again postponed.
Starting pitcher, Johnny Vander Meer throws back-to-back no-hitters, meaning they came in two consecutive starts, something not accomplished before or since.

American boxer Henry Armstrong simultaneously holds the featherweight, welterweight & lightweight world titles.

Victorian Football League
- Carlton wins the 42nd VFL Premiership (Carlton 15.10 (100) d Collingwood 13.7 (85))
- Brownlow Medal awarded to Dick Reynolds (Essendon)

American, Don Budge becomes the first male tennis player to complete the Grand Slam in tennis of all 4 Championships.

February - British Empire Games held in Sydney, Australia
March 3 - Glenn Cunningham breaks the world record for the indoor mile run by completing the distance in 4 minutes, 4.4 seconds.
In what was billed as the "Match of the Century", Seabiscuit defeated the United States Triple Crown of Thoroughbred Racing champion, War Admiral.