UFC 173 Live Results, Play-by-Play and Fight Card Highlights Bleacher Report UFC 173 is scheduled for Saturday, May 24, in Las Vegas. Preliminary action kicks off at 6:30 p.m. ET, with the main card beginning at 10 p.m. ET. Headlining UFC 173 is a bantamweight title clash between reigning champion Renan Barao and upstart Team ...