Conor McGregor blasts Cerrone in 40 seconds in UFC return LAS VEGAS — Conor McGregor came back with a big bang. McGregor stopped Donald Cerrone with a head kick and punches 40 seconds into the first round at UFC 246 on Saturday night, announcing his return to mixed martial arts with his first victory since 2016. The Irish former two-division champion came out of a three-year stretch of relative inactivity and outside-the-cage troubles with a performance that echoed his greatest fights during his unparalleled rise. After bloodying Cerrone's nose with his first punch, McGregor (22-4) then floored Cerrone (36-14) only 20 seconds into the bout with a perfectly placed left kick to the head. He mercilessly finished on the ground to the delight of a sellout crowd of 19,040 at T-Mobile Arena.