Spencer (8-2 MMA, 2-2 UFC) meets Wolf (1-0 MMA, 0-0 UFC) on May 22 at UFC Fight Night, which does not yet have an official venue or location.
A person with knowledge of the matchup confirmed the booking to MMA Junkie on Tuesday but asked to remain anonymous as the promotion has yet to make an official announcement. BJPenn.com was first to report the news.