Kentucky Derby
May 1 102nd Kentucky Derby: Puerto Rican jockey Ángel Cordero Jr wins aboard Bold Forbes, the second of 3 Derby successes
Stanley Cup
May 16 Stanley Cup Final, The Spectrum, Philadelphia, PA: Guy Lafleur and Pete Mahovlich each have a goal and 2 assists as Montreal Canadiens beat Philadelphia Flyers, 5-3 for a 4 games series sweep
- May 22 St Louis Cardinal Reggie Smith hits 3 HR
Boxing Title Fight
May 24 Muhammad Ali TKOs Richard Dunn in 5 for heavyweight boxing title in Munich
- May 29 Only HR of Joe Niekro's 22-year career, comes off brother Phil
- May 30 Indianapolis 500: Polesitter Johnny Rutherford awarded race after taking the lead on lap 80, and leading when rain halted the race on lap 103; shortest Indy 500 in history
- May 30 LPGA Championship Women's Golf, Pine Ridge GC: Betty Burfeindt wins her only major title, 1 stroke ahead of runner-up Judy Rankin
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions