- Sep 1 Sammy Adjei, Ghanaian soccer goalkeeper (38 caps; FC Ironi Ashdod), born in Accra, Ghana
- Sep 2 Hiroki Yoshimoto, Japanese racing driver
- Sep 3 Daniel Ruben Bilos, Argentinian footballer, born in Pergamino, Argentina
- Sep 3 Jennie Finch, American softball pitcher (Olympic gold 2004, silver 2008) and broadcaster (ESPN), born in La Mirada, California
- Sep 4 Pat Neshek, American baseball pitcher (MLB All Star 2014 St. Louis Cardinals, 2017 Philadelphia Phillies), born in Madison, Wisconsin
- Sep 5 Franco Costanzo, Argentinian football goalkeeper, born in Río Cuarto, Argentina
- Sep 6 Joseph Yobo, Nigerian soccer defender (101 caps; Standard Liège, Marseille, Everton, Fenerbahçe), born in Kono, Rivers State, Nigeria
- Sep 6 Samuel Peter, Nigerian-American heavyweight boxer, born in Akwa Ibom, Nigeria
- Sep 7 Gabriel Milito, Argentine soccer defender (42 caps; Independiente, Zaragoza), born in Bernal, Argentina
- Sep 7 Javad Nekounam, Iranian soccer midfielder (151 caps; Pas, Osasuna), born in Rey, Iran
- Sep 7 Mark Prior, American baseball pitcher who was a MLB All Star 2003 Chicago Cubs; coach World Series 2020 LA Dodgers, born in San Diego, California
- Sep 7 Sara Carrigan, Australian cyclist (Olympic gold, road race 2004), born in Gunnedah, New South Wales
- Sep 8 Teruyuki Moniwa, Japanese footballer, born in Atsugi, Kanagawa, Japan
- Sep 10 Timothy Goebel, American figure skater (first to land quadruple salchow jump; Olympic bronze 2002; World C'ship silver 2002, 03), born in Evanston, Illinois
- Sep 11 Antônio Pizzonia, Brazilian race car driver, born in Manaus, Amazonas, Brazil
- Sep 11 Mike Comrie, Canadian ice hockey player, born in Edmonton, Alberta, Canada
- Sep 12 Fernando César de Souza, Brazilian footballer, born in Jardinopolis, Brazil
- Sep 12 Josef Vašíček, Czech ice hockey center (World C'ship gold 2005; Carolina Hurricanes), born in Havlíčkův Brod, Czechoslovakia (d. 2011)
- Sep 12 Sean Burroughs, American baseball player, born in Atlanta, Georgia
- Sep 12 Yao Ming, Chinese basketball player, born in Shanghai
- Sep 13 Daisuke Matsuzaka, Japanese baseball player, born in Aomori, Japan
- Sep 13 Evangelos Nastos, Greek footballer, born in Thessaloniki, Greece
- Sep 15 David Diehl, American football player (NY Giants), born in Chicago, Illinois
- Sep 15 Mike Dunleavy, Jr., American basketball player and manager (Golden State Warriors), born in Fort Worth, Texas
- Sep 16 Patrik Štefan, Czech ice hockey player, born in Příbram, Czechoslovakia
- Sep 17 Asashoryu Akinori, Mongolian sumo wrestler (born as Dolgorsuren Dagvador)
- Sep 17 Danny Haren, American baseball player, born in Monterey Park, California
- Sep 18 Avi Strool, Israeli footballer, born in Tel Aviv, Israel
- Sep 20 Vladimir Karpets, Russian cyclist
- Sep 21 Nyree Lewis, British Paralympic swimmer
- Sep 21 Tomas Scheckter, South African racing driver
- Sep 24 Daniele Bennati, Italian professional road racing cyclist, born in Arezzo, Italy
- Sep 24 Dean Canto, Australian racing driver (Supercars), born in Sydney, Australia
- Sep 24 John Arne Riise, Norwegian footballer, born in Molde, Norway
- Sep 24 Petri Pasanen, Finnish footballer, born in Lahti, Findland
- Sep 26 Aurélien Rougerie, French rugby union outside back (76 caps; ASM Clermont Auvergne), born in Beaumont, France
- Sep 26 Henrik and Daniel Sedin, Swedish ice hockey players, born in Örnsköldsvik, Sweden
- Sep 26 Patrick Friesacher, Austrian race car driver, born in Wolfsberg, Austria
- Sep 29 Patrick Agyemang, English footballer, born in London, England
Martina Hingis (43 years old)
Sep 30 Swiss tennis player (5 Grand Slam singles titles), born in Košice, Czechoslovakia (now Slovakia)
About September 1980
How Old? 43 years old
Generation: Generation X
Leap Year: Yes
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions