- Sep 1 Earnie Shavers, American boxer (2 x world heavyweight c'ship challenger [Muhammad Ali 1977, Larry Holmes 1979]), dies at 78
- Sep 4 Boris Lagutin, Russian boxer (Olympic gold USSR light-middleweight 1964, 68; bronze 1960), dies at 84
- Sep 5 Hans Eder, German soccer defender (Hertha BSC) and manager (Hertha BSC 1974, 79, 85), dies at 87
- Sep 5 Mark Littell, American MLB pitcher, 1973-82 (Kansas City Royals, St. Louis Cardinals), writer, and inventor, dies following heart surgery at 69
- Sep 6 Dan Schachte, American ice hockey linesman (Canada Cup 1991; World Cup of Hockey 1996; Winter Olympics 2002; Stanley Cup Finals 1997, 98, 2000, 01, 02), dies from diabetes complications at 64
- Sep 6 Guy Morriss, American football coach (Kentucky, Baylor, Texas A&M–Commerce) and guard (Philadelphia Eagles, New England Patriots), dies from Alzheimer's disease at 71
- Sep 7 Piet Schrijvers, Dutch soccer goalkeeper (46 caps; FC Twente, AFC Ajax 269 games), dies at 75
- Sep 8 Dave Smith, Scottish soccer manager (Mansfield Town, Southend United, Plymouth Argyle, Dundee, Torquay United), dies at 88
- Sep 10 Frank Cignetti Sr., American College Football HOF coach (West Virginia Uni, Indiana University of Pennsylvania; career college record 199–77–1), dies at 84
- Sep 13 Horacio Accavallo, Argentine boxer (undisputed WBA & WBC flyweight titles 1966-68), dies at 87
- Sep 14 Géza Csapó, Hungarian sprint canoeist (6 x World C'ship gold; Olympic silver K-1 1000m 1976, bronze 1972), dies at 71
- Sep 15 Eddie Butler, Welsh rugby union #8 (16 caps; Cambridge University RFC, Pontypool RFC), journalist (The Observer Sport, The Guardian) and broadcaster (BBC), dies at 65
- Sep 15 John Stearns, American baseball catcher (MLB All Star 1977, 79, 80, 82; New York Mets), dies from prostate cancer at 71
- Sep 16 Luciano Vassallo, Eritrean soccer midfielder (104 caps Ethiopia; Cotton Factory Club 1960-73) and manager (Ethiopia, Cotton FC), dies at 87
- Sep 18 Mustafa Dağıstanlı, Turkish freestyle wrestler (Olympic gold 57kg 1956, 62kg 1960; World C'ship gold 1954, 57, 59), dies at 91
- Sep 19 Julien Rascagnères, French rugby league referee (10 Tests), dies at 77
- Sep 19 Maury Wills, American baseball shortstop (7 x MLB All-Star; NL MVP 1962, World Series 1959, 63, 65; LA Dodgers), dies at 89
- Sep 19 Vladimir Golubev, Russian soccer defender (3 caps USSR; Zenit Leningrad 335 games) and manager (Zenit Leningrad), dies at 72
- Sep 21 Darrell Mudra, American College Football HOF coach (Adams State, North Dakota State, Uni of Arizona, Western Illinois Uni, Florida State, Eastern Illinois Uni; Montreal Alouettes), dies at 93
- Sep 22 Tim Hankinson, American soccer coach (Alabama A&M, Syracuse University; Tampa Bay Mutiny, Colorado Rapids), dies from cancer at 67
- Sep 24 Andon Boshkovski, Macedonian handball coach (Georgia 2017-19, Macedonia [ass't] 2008-13), dies at 47
- Sep 24 Pavel Pervushin, Russian weightlifter (World C'ship gold 110kg 1973; 15 x WRs), dies at 75
- Sep 25 Andrés Prieto, Chilean soccer forward (16 caps; Universidad Católica, Español) and manager (Universidad Católica, Liverpool FC, Bolívar, Real Santa Cruz), dies at 93
- Sep 25 Rafael Chimishkyan, Georgian weightlifter (Olympic gold USSR 60kg 1952; World C'ship gold 60kg 1954, 55), dies at 93
- Sep 26 Ronney Pettersson, Swedish soccer goalkeeper (17 caps; IFK Skövde, Djurgårdens IF, Hudiksvalls ABK), dies at 82
- Sep 26 Tom Reed, American college football coach (Miami University, North Carolina State University), dies at 77
- Sep 27 Bruno Bolchi, Italian soccer midfielder (4 caps; Inter, Verona, Atalanta, Torino) and manager (AC Cesena, Bari, Messina, Genoa), dies at 82
- Sep 30 François Remetter, French soccer goalkeeper (26 caps; RC Strasbourg, FC Metz, FC Sochaux), dies at 94
- Sep 30 Marvin Powell Jr., American College Football HOF offensive tackle (USC; First-team All-Pro 1979, 82; 5 x Pro Bowl; NY Jets, TB Buccaneers), dies of heart failure at 67
- Sep 30 Rick Redman, American College Football HOF linebacker (University of Washington; AFL All-Star 1967; San Diego Chargers), dies at 79
- Sep 30 Robin Marlar, English cricket spin bowler (Cambridge University CC, Sussex CCC) and journalist (The Sunday Times; "The Story of Cricket"), dies at 91
- Sep 30 Yury Zaitsev, Russian weightlifter (Olympic gold USSR 110kg 1976), dies at 71
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