Kentucky Derby
May 3 78th Kentucky Derby: Eddie Arcaro aboard Hill Gail wins his record fifth Derby
Sports History
May 15 Johnny Longden becomes 2nd jockey to ride 4,000 winners
- May 17 77th Preakness: Conn McCreary aboard Blue Man wins in 1:57.4
- May 21 Booklyn Dodgers score 15 runs in their 1st inning to beat Cincinnati Reds 19-1
- May 30 Charlie Grimm succeeds Tommy Holmes as manager of Boston Braves
- May 30 Indianapolis 500: Troy Ruttman at 22 years 80 days sets record for youngest 500 winner in history; his Kuzma-Offenhauser is last dirt track car to win at Indy