Events in Sport
- May 4 Oriole Gregg Olson sets relief pitcher rec of 41 cons scoreless inns
- May 5 116th Kentucky Derby: Craig Perret aboard Unbridled wins in 2:02
- May 6 Ayako Okamoto wins LPGA Sara Lee Golf Classic
- May 9 Sampdoria of Italy win 30th European Cup Winner's Cup against Anderlecht of Belgium 2-0 in Gothenburg
- May 9 NHL Prince of Wales Conference Final: Boston Bruins beat Washington Capitals, 4 games to 0
- May 11 NY Yankees trade Dave Winfield to Angels for Mike Witt
- May 12 NHL Clarence Campbell Conference Final: Edmonton Oilers beat Chicago Blackhawks, 4 games to 2
- May 13 Dottie Mochrie wins LPGA Crestar Golf Classic
- May 14 46th time opposing pitchers hit HR, Valenzuela (Dodgers)/Gross (Expos)
- May 15 Edmonton Oiler Klima beats Boston Bruins in 6th period
- May 18 Cubs Ryne Sandberg ends 2nd baseman record 123 errorless game streak
Event of Interest
May 18 Jari Kurri sets a record for scoring in a Stanley Cup Finals game, registering three goals and two assists vs the Boston Bruins

Jari Kurri
Baseball Record
May 22 Andre Dawson receives a record 5 intentional walks in a game

Andre Dawson
Event of Interest
May 22 Deion Sanders becomes involved in a dispute with Chicago White Sox catcher Carlton Fisk, one of the most infamous incidents of Sanders' baseball career

Deion Sanders
Event of Interest
May 26 Philadelphia Phillies retire Mike Schmidt's uniform #20

Mike Schmidt
Golf Tournament
May 27 Pat Bradley wins LPGA Corning Golf Classic

Pat Bradley
- May 29 NY Mets fire manager Davey Johnson & hire Bud Harrelson
Baseball Record
May 29 Rickey Henderson steals record 893rd base, breaking Ty Cobb's record

Rickey Henderson

Ty Cobb
Birthdays in Sport
- May 3 Brooks Koepka, American PGA golfer (US Open 2017), born in West Palm Beach, Florida
José Altuve
May 6 José Altuve, Venezuelan professional baseball second baseman (Houston Astros), born in Maracay, Venezuela

José Altuve
Deaths in Sport
- May 22 Rocky Graziano, boxer/writer/actor (Mr Rock & Roll), dies at 71 of heart failure