- Sep 1 Tim Hardaway, American basketball guard (NBA All-Star 1991–93, 97, 98; All-NBA First Team 1997; Olympic gold 2000; Golden State Warriors, Miami Heat), born in Chicago, Illinois
- Sep 2 Massimo Cuttitta, Italian rugby union prop (69 caps [captain 16]; Milano, Harlequins, Bologna), born in Latina, Italy (d. 2021)
- Sep 2 Olivier Panis, French race car driver
- Sep 3 Bennie Blades, American NFL safety (Pro Bowl 1991; Detroit Lions), born in Fort Lauderdale, Florida
- Sep 4 Jearl Miles Clark, American athlete (Olympic gold 4x400m relay 1996, 2000; World C'ship gold 400m 1993; 4x400m relay 1993, 95, 2003), born in Gainesville, Florida
- Sep 5 Milinko Pantić, Serbian footballer, born in Loznica, Serbia
- Sep 5 Simone Jacobs, British 4X100m relayer (Olympic bronze 1984), born in Reading, Berkshire, England
- Sep 6 Joan Guetschow, American biathlete (Olympics 1994), born in Akron, Ohio
- Sep 8 Mike Dyer, American MLB pitcher (Montreal Expos), born in Upland, California
- Sep 8 Raymond Atteveld, Dutch soccer player (Waregem, Roda JC), born in Amsterdam, Netherlands
- Sep 9 Alison Sydor, Canadian cyclist (Olympic silver 1996), born in Edmonton, Canada
- Sep 9 Georg Hackl, German luger, born in West Germany
- Sep 9 Kevin Hatcher, American NHL defenseman (Team USA, Dallas, Pitts), born in Detroit, Michigan
- Sep 9 Lance Blanks, American basketball guard (Detroit Pistons, Minnesota Timberwolves), executive (GM Phoenix Suns 2010-13) and broadcaster (ESPN, Longhorn Network), born in Del Rio, Texas (d. 2023)
- Sep 10 Joe Nieuwendyk, Canadian NHL center (Stanley Cup 1989 Calgary, 1999 Dallas, 2003 New Jersey; Olympic gold 2002), born in Oshawa, Ontario
- Sep 11 Richard Harvey, American NFL linebacker (New Orleans Saints), born in Pascagoula, Mississippi
- Sep 13 Igor Kravchuk, Russian NHL defenseman (Team Russia, St Louis), born in Ufa, Russia
- Sep 15 Sherman Douglas 'the General', American NBA guard (NJ Nets), born in Washington D.C.
- Sep 16 Kevin Curtis Young, American 400m hurdler, born in Los Angeles, California
- Sep 17 Fred Childress, American CFL guard (Calgary Stampeders), born in Little Rock, Arkansas
- Sep 18 Isabelle Demongeot, French tennis star, born in Gassin, France
- Sep 22 Mike Richter, American ice hockey goalie (Stanley Cup 1994 NY Rangers; World Cup gold 1996; Olympic silver 2002), born in Abington, Pennsylvania
- Sep 22 Stefan Rehn, Swedish footballer and manager, born in Stockholm, Sweden
- Sep 23 Doug Widell, NFL guard (Detroit Lions)
- Sep 23 Pete Harnisch, American baseball pitcher (MLB All Star 1991 Houston Astros; Baltimore Orioles, NY Mets, Cincinnati Reds), born in Commack, New York
- Sep 24 Atul Bedade, Indian cricketer (ODI batsman), born in Bombay, India
- Sep 24 Bernard Gilkey, American MLB outfielder (NY Mets), born in St Louis, Missouri
- Sep 24 Kevin Koslofski, American MLB outfielder (Milwaukee Brewers), born in Decatur, Illinois
- Sep 26 Craig Heyward, American NFL fullback (Pro Bowl 1995; New Orleans Saints), born in Passaic, New Jersey (d. 2006)
- Sep 26 Francisco Andreu, American road cyclist (Olympic 4th 1988, 96), born in Dearborn, Michigan,
- Sep 28 Scott Adams, American NFL offensive linesman (Chicago Bears), born in Lake City, Florida (d. 2013)
- Sep 29 Hersey Hawkins, American NBA guard (Seattle Supersonics, Olympic bronze 1988), born in Chicago, Illinois
- Sep 29 Ken Norton Jr, American football linebacker (Super Bowl XXVII, XXVIII, XXIX; First-team All-Pro 1995; 3 × Pro Bowl; Dallas Cowboys, SF 49ers) and coach, born in Jacksonville, Illinois
- Sep 29 Rudy Poeschek, Canadian NHL right wing (Tampa Bay Lightning), born in Kamloops, British Columbia
About September 1966
How Old? 57 years old
Generation: Generation X
Leap Year: No
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions