- May 8 63rd Kentucky Derby: Charley Kurtsinger on War Admiral wins 2:03.2
- May 9 Reds beat Phillies 21-10 (Ernie Lombardi goes 6 for 6)
- May 12 St Louis Cards beat Philadelphia Phillies, 15-3
- May 15 62nd Preakness: Charley Kurtsinger aboard War Admiral wins in 1:58.4
Hubbell's Record Win
May 27 New York Giants pitcher Carl Hubbell wins his MLB record 24th consecutive game in a 3-2 win over the Cincinnati Reds at Crosley Field; streak starts July 17, 1936
20th PGA Championship
May 30 20th PGA Championship Men's Golf, Pittsburgh Field Club: Defending champion Denny Shute defeats Jug McSpaden in 37 holes
- May 30 42nd Men's French Championships: Henner Henkel beats Bunny Austin (6-1, 6-4, 6-3)
- May 30 42nd Women's French Championships: Hilde Sperling beats Simonne Mathieu (6-2, 6-4)
- May 31 Indianapolis 500: Wilbur Shaw and riding mechanic 'Jigger' Johnson win race from Ralph Hepburn by 2.16 seconds, closest finish to that point; Johnson last winning riding mechanic
- May 31 Second largest crowd in Polo Grounds history (61,756) sees Brooklyn Dodgers beat NY Giants, 10-3, ending Carl Hubbell's record consecutive-game winning streak at 24
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions