- Sep 1 David Bairstow, English cricket wicket keeper, broadcaster (4 Tests, 13 dismissals; father of England Test 'keeper Jonny; Yorkshire CCC), born in Bradford, Yorkshire (d. 1998)
- Sep 5 Paul Breitner, German footballer, born in Kolbermoor, Germany
- Sep 7 Mark McCumber, American golfer (10 PGA Tour titles; Tour C'ship 1994), born in Jacksonville, Florida
- Sep 8 Tim Gullikson, American tennis player and coach (Pete Sampras coach 1992-95; Martina Navratilova Mary Joe Fernandez), born in La Crosse, Wisconsin (d. 1996)
- Sep 10 Gary Danielson, American NFL quarterback (Detroit Lions 1976-84; Cleveland Browns 1985, 87-88) and college commentator (CBS, ABC), born in Detroit, Michigan
- Sep 15 Johan Neeskens, Dutch footballer, born in Heemstede, Netherlands
- Sep 15 Pete Carroll, American football coach (Super Bowl 2013, Seattle Seahawks; New York Jets, New England Patriots; USC), born in San Francisco, California
- Sep 16 Andy Irvine, Scottish rugby union fullback (51 Tests [12 as captain] 269 points, 9 British & Irish Lions; Edinburgh District RFU), born in Edinburgh, Scotland
- Sep 18 Darryl Stingley, American NFL football wide receiver, 1973-77 (New England Patriots), born in Chicago, Illinois (d. 2007)
- Sep 18 Marc Surer, Swiss motor racing driver, born in Arisdorf, Switzerland
Guy Lafleur (1951-2022)
Sep 20 Canadian Hockey HOF right wing (5 x Stanley Cup, 2 x NHL MVP, NHL Playoff MVP Montreal Canadiens; NY Rangers, Quebec Nordiques), born in Thurso, Quebec [1]
- Sep 21 Bruce Arena, American soccer coach (Olympic gold 1996), born in Brooklyn, New York
- Sep 21 Ed Delahoussaye, American Racing Hall of Fame jockey (1982-83 Kentucky Derby), born in New Iberia, Louisiana
- Sep 24 Terry Metcalf, American NFL, CFL running back (St Louis, Toronto), born in Seattle, Washington
- Sep 25 Robert "Bob" McAdoo, American former NBA player (Buffalo Braves) and assistant coach (Miami Heat), born in Greensboro, North Carolina
- Sep 29 Maureen Caird, Australian hurdler (youngest to win individual Olympic Gold at 17 in 1968), born in Cumberland, Australia
- Sep 30 Catie Ball, American 100m breast stroke swimmer (Olympic-4X4 gold-1968)
About September 1951
How Old? 72 years old
Generation: Baby Boomer
Leap Year: No
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions