- May 1 Armando Reynoso, Mexican Baseball Hall of Fame pitcher (Atlanta Braves, Colorado Rockies, New York Mets, Arizona Diamondbacks), born in San Luis Potosi, Mexico
- May 1 Olaf Thon, German soccer midfielder (52 caps; Bayern Munich, Schalke 04), born in Gelsenkirchen, Germany
- May 3 Darren Morgan, Welsh snooker player, born in Newport, Wales
- May 3 M-16 [Ernest Mateen], American cruiserweight boxing champion, born in Brooklyn, New York (d. 2012)
- May 5 Mike Stapleton, Canadian NHL center (Winnipeg Jets), born in Sarnia, Ontario
- May 7 Anderson Cummins, Barbados Canadian cricketer (in Packer's Valley Barbados & WI quickie), born in Christ Church, Barbados
- May 8 Cláudio Taffarel, Brazilian soccer goalkeeper (101 caps; World Cup 1994; Internacional, Parma, Atlético Mineiro, Galatasaray), born in Santa Rosa, Brazil
- May 9 Mark Tinordi, Canadian NHL defenseman (Washington Capitals), born in Red Deer, Alberta
- May 10 Jonathan Edwards, British athlete (Olympics gold triple jump 2000, silver 1996; World C'ship gold 1995, 2001), born in London, England
- May 10 Mikael Andersson, Swedish NHL left wing (Tampa Bay Lightning), born in Malmö, Sweden
- May 11 Chris Mohr, NFL punter (Buffalo Bills)
- May 11 Trenidad Hubbard, American MLB outfielder (Colorado Rockies), born in Chicago, Illinois
- May 12 Rafael Bournigal, Dominican infielder (Oakland A's), born in Azua, Dominican Republic
- May 14 Leroy Blugh, CFL defensive end (Edmonton Eskimos)
- May 14 Pooh Richardson, NBA guard (NBA All-Rookie First Team 1990 Minnesota Timberwolves; Los Angeles Clippers), born in Philadelphia, Pennsylvania
- May 15 Paul Ysebaert, Canadian NHL player (Tampa Bay Lightning), born in Sarnia, Ontario
- May 16 Thurman Thomas, American College/Pro Football HOF running back (Oklahoma State Uni; NFL MVP, NFL Offensive Player of the Year 1991; First-team All-Pro 1990, 91; 5 x Pro Bowl; Buffalo Bills), born in Houston, Texas
- May 17 Danny Manning, American basketball forward (NBA All-Star 1993, 94; NBA Sixth Man of the Year 1998; Phoenix Suns), born in Hattiesburg, Mississippi
- May 17 Mark Kratzmann, Australia, tennis star
- May 19 Keith Jennings, NFL tight end (Chicago Bears)
- May 19 Marc Bureau, Trois Rivieres, NHL center (Montreal Canadiens)
- May 20 Lawyer Tillman, NFL tight end (Green Bay Packers, Carolina Panthers)
- May 20 Liselotte Neumann, Swedish golfer (US Open 1988; 13 LPGA Tour titles), born in Finspang, Sweden
- May 22 Donald Royal, American NBA forward (Charlotte Hornets, Orlando Magic), born in New Orleans, Louisiana
- May 22 José Mesa, Dominican MLB baseball pitcher, 1987-2007, 2X All-Star (Cleveland Indians; Philadelphia Phillies, and 6 other teams), born in Pueblo Viejo, Dominican Republic
- May 23 Gary Roberts, Canadian ice hockey left wing (NHL All-Star 1992, 93, 2004; Calgary Flames, Carolina Hurricanes, Toronto Maple Leafs), born in North York, Ontario
- May 23 Graeme Hick, English cricket batsman (65 Tests, 6 x 100s; 120 ODIs; Worcestershire), born in Harare, Zimbabwe
- May 24 Eric Cantona, French footballer and actor (Looking for Eric), born in Marseille, France
- May 24 Ricky Craven, American NASCAR driver, born in Newburgh, Maine
- May 24 Tony Jones, American NFL tackle (Super Bowl 1997, 98; Second-team All-Pro 1994; Pro Bowl 1998; Cleveland Browns, Denver Broncos), born in Royston, Georgia (d. 2021)
- May 26 Grant Bradburn, New Zealand cricketer and coach (son of Wynne NZ off-spinner), born in Hamilton, New Zealand
- May 26 Zola Budd Pieterse, Bloemfontein South Africa, track star (Olympics 1988)
- May 27 Eric Leckner, NBA center (Detroit Pistons)
- May 27 John Jaha, infielder (Milwaukee Brewers), born in Portland, Oregon
- May 27 Ray Sheppard, Pembroke, NHL right wing (Florida Panthers)
- May 30 Gary Martin, cricket pace bowler (Zimbabwe ODI)
- May 31 Jessica Monroe, Canadian rower (Olympic gold coxless four, eight 1992, silver eight 1996), born in Palo Alto, California
- May 31 Roshan Mahanama, Sri Lankan cricket batsman (52 Tests, 4 x 100, HS 225; 213 ODIs; Colombo CC, Bloomfield CC), born in Colombo, Sri Lanka
About May 1966
How Old? 57 years old
Generation: Generation X
Leap Year: No
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions