The Octagon makes its first stop ever in Sioux Falls, South Dakota tonight with UFC Fight Night 91.
Original plans called for a meeting of former Ultimate Fighter winners and lightweight contenders, but an injury to Michael Chiesa knocked him out of a bout vs. Tony Ferguson.
The new main event pits Michael McDonald vs. John Lineker from the Denny Sanford Premier Center on FOX Sports 1. Ferguson remains on the docket, taking on newcomer Landon Vannata.
Check out fight-by-fight predictions in the following slideshow: