Events in Sport
- Sep 3 Houston Astros & Chicago Cubs use MLB record 53 players, including 17 pitchers in a 2-day 18 inning marathon; Astros win 8-7
- Sep 6 Michael Spinks TKOs Steffen Tangstad in 4 for heavyweight boxing title
US Open Women's Tennis
Sep 6 US Open Women's Tennis: Martina Navratilova wins her 3rd US singles title; beats Czech star Helena Suková 6-3, 6-2

Martina Navratilova
- Sep 7 Cleveland Browns becomes 1st team in NFL history to have a play reviewed by instant replay, Chicago 41, Browns 31
Event of Interest
Sep 7 Dan Marino throws his 100th career touchdown pass, the fastest QB in NFL history to do so

Dan Marino
US Men's Tennis Open
Sep 7 US Open Men's Tennis: In an all-Czech final Ivan Lendl retains his title; beats Miloslav Mečíř 6-4, 6-2, 6-0

Ivan Lendl

Miloslav Mecir
- Sep 13 Bert Blyleven gives up a record 44 HRs in a season
- Sep 14 Saskatchewan & Hamilton play 1st CFL regular-season overtime game
- Sep 18 David Boon's 3rd Test cricket century, 122 v India at Madras
- Sep 19 Chicago White Sox Joe Crowley no-hits California Angels, 7-1
- Sep 19 Australian cricketer Dean Jones scores 210 v India at Madras
- Sep 21 NY Jets beat Miami Dolphins 51-45 in OT; record 884 passing yards
- Sep 21 New Orleans Saints Mel Gray returns kickoff 101 yards for a touchdown
- Sep 21 SD Padre Jimmy Jones pitches 1-hitter in his major league debut
- Sep 22 India v Australia Test Cricket at Madras finishes in a tie
Event of Interest
Sep 22 LA Dodger Fernando Valenzuela is 1st Mexican to win 20 games

Fernando Valenzuela
- Sep 25 Houston Astro Mike Scott no-hits SF Giants, 2-0
- Sep 28 Record 23,000 start in a marathon (Mexico City)
- Sep 28 Tight end Brian Foster of RI catches NCAA record 18 passes for 327 yds
- Sep 28 Cleveland Browns' Gerald McNeil sets the team record for the longest punt return with an 84-yard run (and TD), Browns 24, Detroit 21
Event of Interest
Sep 29 Cubs Greg Maddux defeats Phillies Mike Maddux (1st rookie brothers)

Greg Maddux
Birthdays in Sport
Shaun White
Sep 3 Shaun White, American snowboarder (Olympic gold: 2006, 2010, 2018), born in San Diego, California

Shaun White
- Sep 4 James Younghusband, Philippine footballer, born in Ashford, United Kingdom
- Sep 8 João Moutinho, Portuguese footballer, born in Barreiro, Portugal
- Sep 8 Matt Grothe, American football player, born in Lakeland, Florida
- Sep 9 Justice Chibhabha, Zimbabwean cricketer, born in Masvingo, Zimbabwe
- Sep 9 Luc Richard Mbah a Moute, Cameroonian basketball player, born in Yaounde, Cameroon
- Sep 11 Chiliboy Ralepelle, South African rugby player, born in Tzaneen, South Africa
- Sep 11 Dwayne Jarrett, American football player, born in New Brunswick, New Jersey
- Sep 13 Kamui Kobayashi, Japanese racing driver, born in Amagasaki, Hyōgo, Japan
- Sep 13 Sean Williams, American basketball player, born in Houston, Texas
- Sep 14 Alan Sheehan, Irish footballer (Luton Town), born in Athlone, Ireland
- Sep 17 Landry Mulemo, Belgian footballer
- Sep 17 Dimitrios Regas, Greek sprinter
- Sep 19 Ken Gushi, Japanese racing driver, born in Okinawa, Japan
- Sep 23 Martin Cranie, English footballer
- Sep 27 Ricardo Risatti, Argentine racing driver
- Sep 28 Andrés Guardado, Mexican soccer midfielder (158 caps; Deportivo La Coruña, Valencia, PSV), born in Guadalajara, Jalisco
- Sep 29 Benoît Pouliot, Canadian ice hockey player
- Sep 29 Mark Fraser, Canadian ice hockey player
Deaths in Sport
Hank Greenberg
Sep 4 Hank Greenberg, American Baseball Hall of Fame first baseman (5 × MLB All-Star; World Series 1935, 45; AL MVP 1935, 40; Detroit Tigers), dies of cancer at 75

Hank Greenberg