Jimmie Foxx MLB Debut
May 1 Future Baseball Hall of Fame catcher Jimmie Foxx makes his MLB debut at 17 for Philadelphia A's; pinch-hits a single in 9-4 loss v Washington
50th Preakness
May 8 50th Preakness: Clarence Kummer aboard Coventry wins in 1:59
51st Kentucky Derby
May 16 51st Kentucky Derby: Earl Sande aboard Flying Ebony wins in 2:07.6
Speaker Hits 3,000
May 17 Cleveland Indian Tris Speaker gets his 3,000th hit
- May 26 Future Baseball Hall of Fame center fielder Ty Cobb is first to collect 1,000 extra-base hits when he doubles in Detroit Tigers' 8-1 win against the Chicago White Sox at Comiskey Park
- May 30 Indianapolis 500: Race winner Peter DePaolo becomes first driver to complete 500 miles in under 5 hours, and have an average over 100 mph; Norman Batten drives 21 laps of relief while DePaolo has his hands bandaged due to blisters