- Sep 1 Clare Connor, England cricket all-rounder (16 Tests; hat-trick v India 1999) and administrator (Managing Director Women's Cricket for England and Wales Cricket Board), born in Brighton, England
- Sep 1 Érik Morales, Mexican boxer (WBC super bantamweight title 1997-2000, WBC featherweight 2001-03, unified WBC/IBF super featherweight 2004, WBC super lightweight 2011-12), born in Tijuana, Mexico
- Sep 1 Marcos Ambrose, Australian auto racer (Australian V8 Supercar Series' C'ship 2003, 04; first Australian driver to win in NASCAR Cup Series [2 wins, 46 top-10s, 3 poles), born in Launceston, Australia
- Sep 1 Sebastián Rozental, Chilean soccer forward (27 caps; Universidad Católica, Rangers, Grasshopper Club Zürich, Unión Española), born in Santiago, Chile
- Sep 1 Tom Tierney, Irish rugby union scrum-half (8 Tests; Munster, Connacht, Leicester) and coach (Ireland women), born in Limerick, Republic of Ireland (d. 2023)
- Sep 3 Jevon Kearse 'The Freak', American football player, born in Fort Myers, Florida
- Sep 5 Tatiana Gutsu, Ukrainian gymnast (1992 Olympic Champion), born in Odessa, Soviet Union
- Sep 6 Danny Blankers, Dutch soccer player (PSV/Willem II), born in Goirle, Netherlands
- Sep 8 Gerald Drummond, Costa Rican footballer, born in Limón, Costa Rica
- Sep 8 Jervis Drummond, Costa Rican footballer, born in Limón, Costa Rica
- Sep 8 Sjeng Schalken, Dutch tennis player, born in Weert, Netherlands
- Sep 9 Aki Riihilahti, Finnish footballer, born in Helsinki, Finland
- Sep 9 Mattias Ohlund, Swedish ice hockey player (Vancouver Canucks, Team Sweden 1998), born in Piteå, Sweden
- Sep 10 Greg Henderson, New Zealand track cyclist (World C'ship gold scratch race 2004), born in Dunedin, New Zealand
- Sep 11 Flora Redoumi, Greek hurdler, born in Athens, Greece
- Sep 11 Tomáš Enge, Czech racing driver, born in Liberec, Czech Republic
- Sep 12 Maciej Żurawski, Polish footballer, born in Poznań, Poland
- Sep 13 Craig McMillan, New Zealand cricket all-rounder, coach and broadcaster (55 Tests; 197 ODIs), born in Christchurch, Canterbury
- Sep 13 Giorgos Koltzos, Greek footballer, born in Athen, Greece
- Sep 13 José Théodore, Canadian ice hockey player, born in Saint-Bruno-de-Montarville, Canada
- Sep 14 Mirko Giansanti, Italian motorcycle road racer (140 x Grand Prix starts, 12 x podiuns) and executive (GYTR GRT Yamaha sporting director), born in Termi, Italy (d. 2023)
- Sep 15 Matt Thornton, American baseball pitcher (all-time AL leader in holds; MLB All-Star 2010; CWS), born in Three Rivers, Michigan
- Sep 17 Jonathan Nichols, American dance skater (with partner Tami Tyler), born in Wilmington, Delaware
Ronaldo (47 years old)
Sep 18 Brazilian retired soccer player, popularly described as "O Fenômeno" (The Phenomenon), born in Rio de Janeiro, Brazil [birth not officially registered until 22nd]
- Sep 21 Jana Kandarr, tennis star
- Sep 21 Poul Hübertz, Danish footballer
- Sep 24 Carlos Almeida, Angolan basketball player and politician, born in Luanda, Angola
- Sep 25 Chauncey Billups, American NBA guard, played for 17 seasons for 7 teams (5x All-Star; Finals MVP, 2004 - Detroit), born in Denver, Colorado
- Sep 26 Michael Ballack, German footballer, born in Görlitz, Germany
- Sep 27 Francesco Totti, Italian footballer
- Sep 29 Andriy Shevchenko, Ukrainian football player and coach (Ukrainian national team), born in Dvirkivshchyna, Ukrainian SSR
- Sep 29 Darren Byfield, English football player, born in Sutton Coldfield, England
- Sep 29 Oscar Sevilla, Spanish cyclist, born in Ossa de Montiel, Spain
About September 1976
How Old? 47 years old
Generation: Generation X
Leap Year: Yes
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions