Events in Sport
- May 1 136th Kentucky Derby: Calvin Borel wins aboard Super Saver, his third Derby success in 4 years
- May 9 Oakland A's Dallas Braden becomes 19th pitcher to throw a perfect game (4-0 vs Tampa Bay)
- May 15 Jessica Watson at age 16 becomes the youngest person to sail solo, non-stop and unassisted around the world
- May 15 135th Preakness: Martin Garcia aboard Lookin At Lucky wins in 1:55.47
- May 16 ICC Women's Cricket T20 World Cup, Bridgetown, Barbados: Elise Perry with 3 for 18 off 4 overs leads Australia (106/8) to 3 run victory over New Zealand 103/6
- May 22 18th UEFA Champions League Final: Internazionale beats Bayern Munich 2-0 at Madrid
- May 23 NHL Western Conference Finals: Chicago Black Hawks beat San Jose Sharks, 4 games to 0
- May 24 NHL Eastern Conference Final: Philadelphia Flyers beat Montreal Canadians, 4 games to 1
- May 29 Philadelphia Phillies' Roy Halladay becomes 20th pitcher to throw a perfect game (1-0 vs Florida)
- May 29 Super Rugby Final, Orlando Stadium, Soweto: Bulls (Pretoria) successfully defend their title with a 25-17 win over the Stormers (Cape Town) in an all-South African final
- May 29 In an all South African Super 14 Rugby final, the Bulls (Pretoria) retain title, 25-17 over the Stormers (Cape Town) at the Orlando Stadium, Soweto; Morné Steyn kicks 6 penalties and a conversion for the Bulls
- May 30 Indianapolis 500: Dario Franchitti wins in 3:05:37.0131 (260.107 km/h)
Deaths in Sport
- May 4 Ernie Harwell, American sportscaster (b. 1918)
- May 6 Robin Roberts, American Baseball Hall of Fame pitcher (won 28 consecutive complete games 1952-53), dies at 83
- May 15 Loris Kessel, Swiss racing driver (b. 1950)
- May 15 Besian Idrizaj, Footballer (b. 1987)
- May 23 Jose Lima, Dominican baseball player (b. 1972)
- May 24 Morrie Martin, Major League Baseball pitcher (b. 1922)
- May 25 Alexander Belostenny, Ukrainian basketball player (b. 1959)
- May 25 Alan Hickinbotham, Australian businessman, football player, & football coach (b. 1925)
- May 26 Jarvis Williams, American football player (b. 1965)