UFC 203: Miocic vs. Overeem was a mixed martial arts event produced by the Ultimate Fighting Championship held on September 10, 2016, at the Quicken Loans Arena in Cleveland, Ohio.

[10] The fight was later rescheduled for this event, until Koch pulled out again due to injury and was replaced by promotional newcomer Jason Gonzalez.

However, Taisumov was removed from the fight on September 1 for alleged visa issues and replaced by promotional newcomer Michael McBride.

Dollaway was forced out of his bout against Francimar Barroso due to a back injury he sustained in a malfunctioning elevator at his hotel.

[20] ^ Michael McBride was fined 20 percent of his purse for failing to make the required weight for his fight with Nik Lentz.