- Sep 6 3rd Women's World Games (track & field competition for women) is conducted over 3-days at the Letná Stadium in Prague, Czechoslovakia
- Sep 6 Brooklyn Dodgers beat Phillies 22-8
- Sep 13 50th US National Championship Men's Tennis, Forest Hills NY: John Doeg beats Frank Shields 10-8, 1-6, 6-4, 16-14 for his lone major singles title
World Record 20,000m
Sep 13 Paavo Nurmi runs world record 20,000m (1:04:38.4)
PGA Championship
Sep 13 PGA Championship Men's Golf, Fresh Meadow CC: American based Scotsman Tommy Armour defeats Gene Sarazen 1-up in the final for the second of his 3 major titles
- Sep 13 Winnipeg Rugby Football Club 1st game, loses to St John's Rugby, 7-3
- Sep 14 Detroit Lions (as Portsmouth Spartans) play 1st NFL game, win 13-6
- Sep 16 Phillies trailing 10-5, score 5 in 9th, then Pirates score 4 in top of 10th, so Phillies score 5 in bottom of 10th to win 15-14
- Sep 18 Enterprise (US) beats Shamrock V (UK) in 15th America's Cup
Baseball Record
Sep 18 NY Yankee future Baseball HOF pitcher Red Ruffing hits 2 HRs to beat St Louis Browns, 7-6 at Sportsman's Park, St. Louis
- Sep 24 Portsmouth beats Brooklyn in 1st NFL game played under floodlights
Baseball Record
Sep 27 Chicago Cub's Hack Wilson's 2 HRs give him NL record 56 HRs
Golf Tournament
Sep 27 US Amateur Championship Men's Golf, Merion GC: Bobby Jones scores an 8 & 7 win over Eugene V. Homans to win his 5th National Amateur title and clinch golf's Grand Slam
Lou Gehrig's Streak Ends
Sep 28 Lou Gehrig's errorless streak ends at 885 consecutive games
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions