- May 4 VIII Summer Olympic Games open at Olympic Stadium of Colombes, Paris, France
- May 12 49th Preakness: John Merimee aboard Nellie Morse wins in 1:57.2
- May 17 50th Kentucky Derby: John Mooney aboard Black Gold wins in 2:05.2
- May 30 Indianapolis 500: Lora Lawrence Corum starts the race and is relieved midway by Joe Boyer who drives to victory; both drivers credited as "co-winners"
Baseball Players
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Tennis Champions