Events in Sport
- May 2 30th Kentucky Derby: Shorty Prior riding Elwood wins in 2:08.50
- May 21 Federation Internationale de Football Association (FIFA) forms in Paris
- May 25 38th Belmont: George Odom aboard Delhi wins in 2:06.6
- May 27 NY Giants first baseman Dan McGann collects MLB record 5 stolen bases in 3-1 win over the Brooklyn Superbas at the Polo Grounds in NYC; record broken in 1991 by Otis Nixon
- May 28 29th Preakness: Eugene Hildebrand aboard Bryn Mawr wins in 1:44.2
Birthdays in Sport
- May 3 Red Ruffing, American Baseball Hall of Fame pitcher (6 × MLB All-Star; World Series 1932, 36–39, 41; NY Yankees), born in Granville, Illinois (d. 1986)
- May 5 Gordon Richards, British jockey (winner of 4,870 races), born in Donnington Wood, Telford (d. 1986)
- May 13 Tim Wall, Australian cricketer (18 Tests for Australia 1928-34)
- May 15 Gustav-Adolf Boltenstein, Swedish equestrian dressage (Olympic gold 1952, 56)
- May 16 Hugh Plaxton, Canadian ice hockey player (Olympic gold 1928)
- May 19 Sven Thofelt, Swedish pentathlete (Olympic gold 1928)
- 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)
