- May 3 112th Kentucky Derby: Bill Shoemaker aboard Ferdinand wins in 2:02.8
- May 3 Cubs 3rd baseman Ron Cey hits his 300th & 301st HR
Event of Interest
May 3 NY Yankee Don Mattingly is 6th to hit 3 sacrifice flies in a game

Don Mattingly
Event of Interest
May 14 Reggie Jackson hit his 537th HR passing Mickey Mantle into 6th place

Reggie Jackson

Mickey Mantle
- May 14 NHL Clarence Campbell Conference Final: Calgary Flames beat St. Louis Blues, 4 games to 3
- May 17 111th Preakness: Alex Solis aboard Snow Chief wins in 1:54.8
- May 18 David Goch finishes swimming 55,682 miles in a 25-yd pool
- May 24 Stanley Cup Final, Saddledome, Calgary, AL: Montreal Canadiens beat Calgary Flames, 4-3 for 4-1 series victory
Baseball Record
May 25 KC Royal George Brett gets his 2,000th hit

George Brett
Event of Interest
May 30 Barry Bonds makes his MLB debut for the Pittsburgh Pirates

Barry Bonds