Yamamoto (18-6-2 NC) last competed back in February 2015 at UFC184 against Roman Salazar. That fight was declared a no contest after Salazar wasn't able to continue to fight due to an accidental eye poke. The 39-year-old Yamamoto, who at one point was considered to be one of the best fighters in the world, is currently 1-5 in his past six performances.
Meanwhile, Beal (10-2) is returning to the bantamweight division after having an 0-2 run in the UFC's flyweight division. Beal last victory was in the bantamweight division where he defeated Tateki Matsuda via unanimous decision at UFC Fight Night 50 on September 2014.