The UFC has added a bantamweight bout between George Roop and Francisco Rivera to the UFC 166 fight card slated for Oct. 19 in Houston. Roop (14-9-1) has been on a tumultuous ride during his UFC tenure, managing a 3-3 record in the Octagon. He has, however, won his last two bouts. After losing back-to-back bouts to Hatsu Hioki and Cub Swanson , Roop rebounded with victories over Reuben Duran and former WEC champion Brian Bowles.