- Sep 3 Adam Ondra climbs Silence in Norway, the world's first-ever 9c (5.15d) route
Sports History
Sep 3 Stacy Lewis wins the Cambia Portland Classic and donates her winnings to Hurricane Harvey relief
- Sep 7 Rashid Khan takes the first hat-trick in the history of the Caribbean Premier League
- Sep 9 US Open Women's Tennis: In the first all-American final since 2002 unseeded Sloane Stephens defeats Madison Keys 6-3, 6-0
US Men's Tennis Open
Sep 10 US Open Men's Tennis: Spain's Rafael Nadal wins his 3rd US title; beats Kevin Anderson of South Africa 6-3, 6-3, 6-4
- Sep 13 International Olympic Committee announces Paris (2024) and Los Angeles (2028) will host the Olympic games
- Sep 16 New Zealand All Blacks rugby union team hands South Africa their biggest test match defeat in history; beat Springboks, 57-0 in Rugby Championship round in Albany, NZ
- Sep 17 Evian Championship Women's Golf, Evian Resort GC: Anna Nordqvist of Sweden beats Brittany Altomare at 1st sudden-death playoff hole; event reduced to 54 holes after day 1 abandoned (bad weather)
Sports History
Sep 18 England footballer Wayne Rooney pleads guilty to drunk driving and is banned for driving for 2 years
- Sep 19 New MLB record for most home runs in a season, no. 5,694 hit by Alex Gordon of the Kansas City Royals
- Sep 20 Alex Puccio completes the first female ascent of The Wheel of Chaos V14 (8B+) in Rocky Mountain National Park
- Sep 21 Andre Ward, unified light heavyweight champion and world’s top pound-for-pound boxer, announces his retirement
Sports History
Sep 23 US President Donald Trump withdraws invitation to the White House for NBA champions Golden State Warriors after Stephen Curry says he doesn't want to attend
Sports History
Sep 24 Laver Cup Men's Tennis, Prague: Roger Federer is unbeaten as Team Europe dominates Team World, 15-9 in the inaugural teams event
Sports History
Sep 24 LeBron James calls President Donald Trump "U Bum" in a tweet in response to Trump's comments about Stephen Curry
- Sep 24 Margo Hayes completes the third-ever female ascent of a 9a+ (5.15a) graded route by ascending Realization/Biographie in Céüse, France
- Sep 24 NFL players kneal, lock arms or stay in their dressing room during the anthem in protests against comments made by President Donald Trump
Sports History
Sep 24 Tour Championship Men's Golf, East Lake GC: Xander Schauffele wins rich season-ending event by 1 stroke from Justin Thomas
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions