Bradman scores 236
May 1 Cricket master batsman Don Bradman scores 236 for Australia v Worcestershire in his first 1st class innings in England
- May 5 Australian cricket batting prodigy Don Bradman scores an unbeaten 185 in a tour match for Australia v Leicestershire at Aylestone Road, Leicester
55th Preakness
May 9 55th Preakness: Earl Sande aboard Gallant Fox wins in 2:00.6
- May 16 6th Walker Cup: US, 10-2
- May 17 56th Kentucky Derby: Earl Sande aboard Gallant Fox wins in 2:07.6
- May 20 University of California dedicates $1,500 to research on prevention & cure of athlete's foot
Gehrig's Third Triple HR
May 22 Yankees' future Baseball Hall of Fame 1st baseman Lou Gehrig becomes first to hit 3 HRs three times as NY outscores Philadelphia A's, 20-13; teams combine for then-record 10 homers
- May 24 21-year-old Australian cricket master batsman Don Bradman scores 252 not out in a tour match for Australia v Surrey at Kennington Oval, London
- May 24 NY Yankees' legendary slugger Babe Ruth homers in both games of a doubleheader (beat Philadelphia A's 10-6 & 11-1); gives him 9 HR's in one week
- May 30 Indianapolis 500: Polesitter Billy Arnold takes lead on lap 3 and never gives it up; total 198 laps stands as all-time Indy 500 race record; accompanied by riding mechanic Spider Matlock
British Amateur Championship
May 31 British Amateur Championship, Men's Golf, St. Andrews Links: Bobby Jones scores a 7 & 6 win over Englishman Roger Wethered for the first leg of his Grand Slam
- May 31 Don Bradman batting for Australia v Hampshire at Southampton is 47 not out at stumps, bringing his aggregate to 1,001 runs, the first cricket touring overseas batsman to complete 1,000 runs by end of May
- May 31 Philadelphia Athletics's Max Bishop draws 8 walks in a doubleheader to set MLB record
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