- Jan 1 Becky Kellar-Duke, Canadian ice hockey defenseman (Olympics gold 2002, 06, 10; World C'ship gold 1999, 2000, 01, 04), born in Hagersville, Ontario
- Jan 1 Fernando Tatís Sr., Dominican baseball third baseman (MLB record 8 RBI in one inning, 1999; St. Louis Cardinals), born in San Pedro de Macorís, Dominican Republic
- Jan 2 Reuben Thorne, New Zealand rugby union flanker and captain (50 caps; captain 2002-03; Canterbury Crusaders), born in Christchurch, New Zealand
- Jan 5 Mike Grier, American NHL player forward, 1996-2011 (Edmonton Oilers, Buffalo Sabre, and 2 other teams),and general manager (San Jose Sharks, 2022-present), born in Detroit, Michigan
- Jan 6 James Farrior, American football linebacker (NY Jets), born in Richmond, Virginia
- Jan 6 Jeremy Linn, American 100m breaststroke (Olympics-silver/gold-96), born in Harrisburg, Pennsylvania
- Jan 6 Laura Berg, American softball outfielder (Olympic gold 1996), born in Whittier, California
- Jan 7 Rob Waddell, New Zealand rower (Olympic gold single sculls 2000; World C'ship gold 1998, 99; America's Cup 2003, 07, 13 Team NZ), born in Cambridge, New Zealand
- Jan 8 Vitali Yachmenev, American NHL right wing (LA Kings), born in Chelyabinsk, Russia
- Jan 9 Justin Huish, American archer (Olympic gold individual, team 1996), born in Fountain Valley, California
- Jan 10 Jake Delhomme, American football player, born in Breaux Bridge, Louisiana
- Jan 11 Brad Badger, American football player (Washington Redskins), born in Corvallis, Oregon
- Jan 11 Rory Fitzpatrick, American NHL defenseman (Montreal Canadiens), born in Rochester, New York
- Jan 12 Jocelyn Thibault, Canadian NHL goalie (Montreal Canadiens), born in Montreal, Quebec
- Jan 14 Marcel Koning, Dutch football player (FC The Hague/NEC), born in The Hague, Netherlands
- Jan 15 Greg Loveridge, New Zealand cricketer (NZ leg-spinner, did not bowl v Zim 1996), born in Palmerston North, New Zealand
Mary Pierce (49 years old)
Jan 15 French tennis player (Australian Open 1995, French Open 2000), born in Montreal, Quebec
- Jan 18 Derek Smith, American football linebacker (Washington Redskins), born in American Fork, Utah
- Jan 20 David Eckstein, American baseball player, born in Sanford, Florida
- Jan 20 Norberto Fontana, Argentine racing driver, born in Arrecifes, Argentina
- Jan 21 Casey FitzRandolph, American speed skater
- Jan 21 Ito, Spanish footballer
- Jan 21 Nicky Butt, English soccer midfielder (39 caps; Manchester United 270 games, Newcastle United 134 games), born in Manchester, England
- Jan 21 Yuji Ide, Japanese racing driver
- Jan 22 Felipe Giaffone, Brazilian racing driver, born in São Paulo, Brazil
- Jan 23 Kevin Alexander, American NFL wide receiver (NY Giants), born in Baton Rouge, Louisiana
- Jan 23 Tito Ortiz, American UFC fighter, born in Huntington Beach, California
- Jan 24 Rónald Gómez, Costa Rican footballer, born in Punta Arenas, Costa Rica
- Jan 25 Tim Montgomery, American athlete (Olympic gold 4x100m relay 2000; BALCO scandal), born in Gaffney, South Carolina
- Jan 27 Chaminda Vaas, brilliant Sri Lankan cricket pace bowler (1994- )
- Jan 27 Iván Calderón, Puerto Rican boxer (WBO mini flyweight title 2003-07; WBO, Ring magazine, lineal light flyweight title 2007-10), born in Guaynabo, Puerto Rico
- Jan 30 Juninho Pernambucano, Brazilian footballer, born in Pernambuco, Brazil
- Jan 31 Kenard Lang, American football defensive end (Washington Redskins), born in Orlando, Florida
About January 1975
How Old? 49 years old
Generation: Generation X
Leap Year: No
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions