Red Ruffing (1904-1986)
May 3 American Baseball Hall of Fame pitcher (6 × MLB All-Star; World Series 1932, 36–39, 41; NY Yankees), born in Granville, Illinois
- May 5 Gordon Richards, British jockey (26 x British flat racing Champion Jockey; 4,870 race wins), born in Donnington Wood, Telford (d. 1986)
- May 13 Tim Wall, Australian cricket fast bowler (18 Tests, 56 wickets, BB 5/14; South Australia), born in Semaphore, Australia (d. 1981)
- May 15 Gustav-Adolf Boltenstern, Swedish equestrian (Olympic gold team dressage 1952, 56; silver 1932, bronze 1948), born in Stockholm, Sweden (d. 1995)
- May 16 Hugh Plaxton, Canadian ice hockey left wing (Olympic gold 1928; Montreal Maroons) and politician (House of Commons of Canada 1935-40), born in Barrie, Ontario (d. 1982)
- May 19 Sven Thofelt, Swedish athlete (Olympic gold pentathlon 1928; silver team épée 1936, bronze 1948), born in Stockholm, Sweden (d. 1993)
- May 27 Chūhei Nambu, Japanese athlete (Olympic gold triple jump 1932; only person to have held WRs in both long jump & triple jump), born in Sapporo, Japan (d. 1997)
- May 29 Hubert Opperman, Australian road cyclist, politician (multi-distance world records), born in Rochester, Victoria (d. 1996)
About May 1904
How Old? 119 years old
Generation: Greatest Generation
Leap Year: Yes