UFC Fight Night: Mousasi vs. Hall 2 (also known as UFC Fight Night 99) was a mixed martial arts event produced by the Ultimate Fighting Championship that was held on November 19, 2016 at The SSE Arena in Belfast, Northern Ireland

The event was the second that the organization hosted in Northern Ireland, with the first being UFC 72 in June 2007.

A welterweight bout between ranked contenders Dong Hyun Kim and Gunnar Nelson was expected to serve as the headlined of the event. However on October 21, it was announced that Nelson pulled out due to an injury and the fight was off. Kim is expected to be rescheduled for a future event. In turn, a middleweight rematch between former Strikeforce Light Heavyweight Champion Gegard Mousasi and Uriah Hall was announced as the new headliner. The pairing met previously in September 2015 at UFC Fight Night: Barnett vs. Nelson with Hall taking the victory via second round highlight reel TKO in what was considered a huge upset.

A lightweight bout between Ross Pearson and James Krause was originally booked for The Ultimate Fighter: Team Joanna vs. Team Cláudia Finale. However, Krause pulled out due to undisclosed reasons. The fight was later rescheduled for this event and was expected to serve as the co-main event. Subsequently on October 26, Krause pulled out of the fight citing a torn hamstring. He was then replaced by Stevie Ray.

As a result of the cancellation of UFC Fight Night: Lamas vs. Penn, a flyweight bout between Kyoji Horiguchi and Ali Bagautinov was rescheduled for this event.

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