Marcus McGhee knew the fight was over before the referee, and mercifully decided against landing more punches. In the final preliminary bout of UFC on ESPN 51 at the UFC Apex in Las Vegas, McGhee (8-1 MMA, 2-0 UFC) stopped JP Buys (9-6 MMA, 0-4 UFC) with a vicious right hand. It was a walkoff finish for McGhee, but one that was somewhat awkward due to a slight hesitance from the referee. Ultimately, the fight was declared over at 2:19 of Round 1. It was a clean striking performance from McGhee, who is known for finishing fights early. After being on the receiving end of sharp combinations, Buys folded over after a big right hand from McGhee landed
More here:
UFC on ESPN 51 video: Marcus McGhee folds JP Buys for first-round walkoff knockout – MMA Junkie