September is shaping up to be a great month for sports betting. The MLB regular season is winding down, so it’s crunch time in the baseball world. Meanwhile, the 2021 NFL season is set to kick off with Week 1 on September 10. Also, don’t forget about the MLS, the prestigious U.S. Open tennis tournament, and top MMA events, including UFC 266: Volkanovski vs. Ortega. You can check out the sportsbook reviews for the best places to bet online, where you can also get the best online betting bonus offers.