- May 1 Curtis Martin, Pro Football Hall of Fame running back (Pro Bowl 1995, 96, 98, 2001, 04; First-team All-Pro 2001, 04; NE Patriots, NY Jets), born in Pittsburgh, Pennsylvania
- May 1 Oliver Neuville, German soccer striker (69 caps; Servette, Bayer Leverkusen, Borussia M'gladbach), born in Locarno, Switzerland
- May 3 Dominique Monami, Belgian tennis star, born in Verviers, Liège, Belgium
- May 4 Ed Hervey, American football wide receiver (Grey Cup 2003, 05 Edmonton Eskimos; CFL All-Star 2001, 03) and executive (GM Edmonton Eskimos, Grey Cup 2015), born in Houston, Texas
- May 4 Guillermo Barros Schelotto, Argentine soccer forward (10 caps; Boca Juniors 300 games, Columbus Crew) and manager (Palermo, Boca Juniors, LA Galaxy, Paraguay), born in La Plata, Argentina
- May 5 Johan Hedberg, Swedish ice hockey coach and goalie (Team Sweden, Olympics 1998), born in Nacka, Sweden
- May 5 Matt Dubuc, CFL running back (Toronto Argonauts), born in Montreal, Quebec
- May 5 Muhsin Muhammad, American football wide receiver (Carolina Panthers), born in Lansing, Michigan
- May 6 Clay Williams, OL (Indianapolis Colts)
- May 6 Joe Spiteri, Australian soccer striker (Olyroos, Olympics 1996)
- May 6 Wendy Ward, American golfer (Women's PGA C'ship 2000-01 3rd), born in San Antonio, Texas
- May 7 Dameian Jeffries, NFL defensive end (New Orleans Saints)
- May 7 Paolo Savoldelli, Italian cyclist, born in Clusone, Italy
- May 10 Joshua Eagle, Australian tennis player
- May 10 Rüştü Reçber, Turkish soccer goalkeeper (120 caps, record appearance holder, FIFA World Cup All Star Team: 2002; Fenerbahçe, Barcelona, Beşiktaş), born in Korkuteli, Turkey
- May 11 Michelle Venturella, US softball infielder (Olympic gold 1996)
- May 12 Travis Lutter, American Mixed Martial Arts Fighter (The Ultimate Fighter 4), born in Chamberlain, Dakota
- May 14 Julian White, English rugby union footballer
- May 14 Voshon Lenard, NBA guard (Miami Heat)
- May 15 Suzannah Bianco, synchronized swimmer (Olympics-alt-96), born in San Jose, California
- May 17 Jay Riemersma, tight end (Buffalo Bills)
- May 18 Dario Franchitti, Scottish racecar driver and commentator, born in Bathgate, Scotland
- May 18 Darren Van Impe, Canadian NHL defenseman (Anaheim Mighty Ducks), born in Saskatoon
- May 18 Donyell Marshall, NBA forward and coach (Golden State Warriors), born in Reading, Pennsylvania
- May 18 Tory James, NFL defensive back (Denver Broncos-Super Bowl 32), born in new Orleans, Louisiana
- May 19 Andreas Johansson, Hofors SWE, NHL forward (Pitts, NY Islanders)
- May 22 Aaron Graham, professional American football player (Arizona Cardinals), born in Las Vegas, New Mexico
- May 22 Daniel Tiatto, Australian soccer midfielder (Olyroos, Olympics 1996)
- May 24 Dannes Coronel, Ecuadorian soccer defender (27 caps; El Nacional), born in Naranjal, Ecuador (d. 2020)
- May 24 Karim Alami, Moroccan tennis star, born in Casablanca, Morocco
- May 24 Ville Peltonen, Finnish hockey forward (Team Finland Olympic bronze 1998), born in Vantaa, Finland
- May 25 Duncan Free, Australian rower (Olympics gold 2006), born in Hobart, Tasmania, Australia
- May 25 Jeff Smith, American football cornerback (Scotland Claymores, KC Chiefs), born in Decatur, Tennessee
- May 25 María José Gaidano, Argentine tennis star (1993 Belgium doubles), born in Buenos Aires, Argentina
- May 25 Racquel Spurlock, WNBA center (Houston Comets)
- May 28 Pat Peake, NHL center (Washington Capitals), born in Rochester, New York
- May 29 Alpay Özalan, Turkish soccer centre back, manager, politician (Turkey 90 caps), born in Izmir, Turkey
- May 29 Malcolm Allen, Australian swimmer (1995 World C'ships gold 4x200m freestyle relay), born in Wauchope, NSW
- May 30 Je'Rod Cherry, safety (New Orleans Saints)
- May 30 Steve Charbonneau, CFL defensive linebacker (Montreal Alouettes)
- May 31 Dominique van Roost, Belgian tennis player (1995 Futures-GBR), born in Verviers, Belgium
- May 31 Marty Janzen, American pitcher (Toronto Blue Jays), born in Miami, Florida
- May 31 Tyrone Williams, American NFL defensive back (Green Bay Packers-Super Bowl 31), born in Bradenton, Florida
About May 1973
How Old? 50 years old
Generation: Generation X
Leap Year: No
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions