- May 6 76th Kentucky Derby: William Boland on Middleground wins in 2:01.6
- May 13 First ever race of the Formula 1 World Drivers Championship is run at Silverstone, England and won by Giuseppe Farina of italy in an Alfa Romeo
- May 18 MLB St. Louis Cardinals baseman Tommy Glaviano makes 3 consecutive errors on grounders
75th Preakness
May 20 75th Preakness: Eddie Arcaro aboard Hill Prince wins in 1:59.2
- May 31 Indianapolis 500: Johnny Parsons becomes first American to win a World Championship event; race stopped after 138 laps (345 miles) due to rain
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions