A welterweight matchup between Adlan Amagov (12-2-1 MMA, 1-0 UFC) and T.J. Waldburger (16-7 MMA, 4-2 UFC) has been added to the UFC 166 fight card. UFC 166 takes place Oct. 19 at Toyota Center in Houston. The event’s main card, which features a rubber match between heavyweight champion Cain Velasquez and Junior dos Santos , airs live on pay-per-view following prelims on FOX Sports 1 and Facebook.