- Sep 1 Finnish long distance runner Viljo Heino runs 10,000m world record 29:27.2 in Kouvola, Finland
- Sep 5 US National Championship Men's Tennis: Pancho Gonzales beats fellow American Ted Schroeder 16-18, 2-6, 6-1, 6-2, 6-4; longest singles final match by games (67), before tiebreaker introduction
- Sep 5 US National Championship Women's Tennis, Forest Hills, NY: Defending champion Margaret Osborne duPont beats fellow American Doris Hart 6-4, 6-1
- Sep 13 Ladies Pro Golf Association of America formed in NYC
- Sep 17 Ryder Cup Golf, Ganton GC: US beats Great Britain, 7-5; Americans win 6 of 8 singles matches to claim victory
- Sep 18 Baseball major league record 4 grand slams hit
- Sep 20 Top American tennis player Pancho Gonzales turns professional
Event of Interest
Sep 23 Indian owner Bill Veeck holds funeral services to bury 1948 pennant
Bill Veeck
US Women's Golf Open
Sep 25 US Open Women's Golf, Prince George's CC: Louise Suggs leads wire-to-wire to win by 14 strokes ahead of runner-up and defending champion Babe Zaharias
Louise Suggs