- Sep 1 Jim Fuller, American college football coach and athletics administrator (coach 1977-83; AD 2003-08 Jacksonville State University), dies from COVID-19 at 76
- Sep 1 Juan Rodríguez Vega, Chilean soccer defender (26 caps; Universidad de Chile, Atlético Español), dies at 77
- Sep 2 David Patten, American football wide receiver (Super Bowl 2001, 04, 05; New England Patriots), dies in a road accident at 47
- Sep 3 John Watkins, South African cricket all-rounder (15 Tests, 29 wickets, 3 x 50s; Natal), dies from COVID-19 at 98
- Sep 4 Tunch Ilkin, American football offensive tackle (Pro Bowl 1988, 89; Pittsburgh Steelers) and broadcaster (Pittsburgh Steelers TV & radio 1998-2020), dies of ALS complications at 63
- Sep 5 Ivan Patzaichin, Romanian canoeist (Olympic gold C-2 1000m 1968, 80, 84; C-1 1000m 1972; World C'ship gold x 8), dies from lung cancer at 71
- Sep 6 Jean-Pierre Adams, French soccer centre-back (22 caps; Nîmes, Nice, Paris Saint-Germain), dies after 39 years in a coma at 73
- Sep 9 Danilo Popivoda, Serbian soccer forward (20 caps Yugoslavia; Olimpija, Eintracht Braunschweig), dies at 74
- Sep 9 Urbain Braems, Belgian soccer manager (Anderlecht, Beveren, Standard de Liège, Trabzonspor), dies at 87
- Sep 11 Mick Tingelhoff, American Pro Football HOF center (6 × Pro Bowl; 5 × First-team All-Pro; Minnesota Vikings), dies at 81
- Sep 12 Michel Maïque, French rugby league second rower (8 Tests; FC Lézignan) and politician (Mayor of Lézignan-Corbières 2014-20), dies from acute pancreatitis at 73
- Sep 13 George Wein, American music promoter (Newport Jazz Festival; Newport Folk Festival; New Orleans Jazz and Heritage Festival), dies at 95
- Sep 13 Ruly Carpenter, American baseball executive (principal owner and president Philadelphia Phillies 1972-81), dies at 81
- Sep 14 Yuriy Sedykh, Russian athlete (Olympic gold hammer throw 1976, 80 Soviet Union; WR 86.74m), dies at 66
- Sep 15 Lou Angotti, Canadian ice hockey right wing (Chicago Black Hawks) and coach (St. Louis Blues, Pittsburgh Penguins), dies at 83
- Sep 16 Boet van Dulmen, Dutch motorcycle racer (84 starts, 1 win, 4 podiums,1 pole; Finnish 500cc GP 1979), dies in a road accident at 73
- Sep 16 Dušan Ivković, Serbian basketball point guard (Radnički Belgrade) and coach (Yugoslavia 1987-95; Serbia 2008-13; FIBA HOF), dies from pulmonary edema and herpes at 77
- Sep 17 Roger Brown, College Football Hall of Fame defensive tackle (Maryland Eastern Shore; 6 x Pro-Bowl; Detroit Lions, LA Rams), dies at 84
- Sep 18 Neil McCarthy, American college basketball coach (Weber State Uni 1974-85, New Mexico State Uni 1985-97), dies at 82
- Sep 19 Jimmy Greaves, English soccer striker (57 caps; FIFA World Cup 1966; Chelsea, Tottenham) and journalist/broadcaster (The Sun, World of Sport, On the Ball), dies at 81
- Sep 19 Max Wiltshire, Welsh rugby union lock (4 Tests; Aberavon RFC), dies at 83
- Sep 20 Billy Maxwell, American golfer (US Amateur C'ship 1951; Ryder Cup 1963; 7 x PGA Tour wins), dies at 92
- Sep 20 Jan Jindra, Czech rower (Olympic gold Coxed four 1952, bronze Eight 1960), dies at 89
- Sep 21 Romano Fogli, Italian soccer midfielder (13 caps; Torino FC, Bologna FC 1909, A.C. Milan, Calcio Catania) and manager (Bologna FC), dies at 83
- Sep 22 Orlando Martínez, Cuban boxer (Olympic gold bantamweight 1972), dies at 77
- Sep 23 Nino Vaccarella, Italian auto racer (24 Hours of Le Mans 1964; 12 Hours of Sebring 1970), dies at 88
- Sep 24 Emmanuel Agassi, Iranian boxer and tennis coach (father of Andre Agassi), dies at 90
- Sep 24 Eugeniusz Faber, Polish soccer forward (36 caps; Ruch Chorzów, Lens), dies at 82
- Sep 24 Waka Nathan, New Zealand rugby union flanker (14 Tests; Auckland RU), dies at 81
- Sep 25 Len Ashurst, English soccer defender (Sunderland AFC 409 games) and manager (Cardiff City, Sunderland, Newport County), dies at 82
- Sep 26 Syarhyey Hyerasimets, Belarusian soccer midfielder (25 caps; Shakhter Donetsk, Dinamo Minsk) and manager (Okzhetpes, Piter Saint Petersburg), dies at 55
- Sep 27 Roger Hunt, English soccer forward (34 caps; FIFA World Cup 1966; Liverpool 404 games, 244 goals; Bolton Wanderers), dies at 83
- Sep 28 B. Satyaji Rao, Indian cricket umpire (17 Tests 1960-79; 5 x Ranji Trophy finals), dies at 91
- Sep 29 Glyn Moses, Welsh rugby league fullback (2 caps Wales. 9 Great Britain; Salford, St. Helens), dies at 93
- Sep 29 Heiko Salzwedel, German cycling coach (est. Australian Institute of Sport Road Cycling/MTB program; German, Danish, British Cycling), dies at 64
- Sep 30 José Pérez Francés, Spanish road racing cyclist (Tour de France 1963 overall 3rd), dies at 84
Baseball Players
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Boxers
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Tennis Champions