Melquizael Costa suffered a unanimous decision loss to Arnold Allen in the main event of UFC Vegas 117 on Saturday. The fight was fairly competitive in the first two rounds, but Allen started taking over in the third round. Costa had his moments, but Allen's experience and well-rounded game were too much for the Brazilian. In 25 minutes of action, Costa landed 100 significant strikes. With the loss, Costa's six-fight winning streak was snapped. By losing, Costa dropped to 7-3 in the UFC.

Arnold Allen bounced back in the win column by defeating Melquizael Costa via unanimous decision in the main event of UFC Vegas 117 on Saturday. The first two rounds were competitive, but in the third round, Allen started taking over. Allen ended the third round on top, and after that, he dominated Costa to win the fourth and fifth rounds. The cageside judges scored the fight 50-45, 50-45 and 49-46 in favor of Allen. In 25 minutes of action, Allen landed seven takedowns and 98 significant strikes. With the win, Allen improved to 12-3 in the UFC.

Daniel Santos suffered a second-round TKO loss to Dooho Choi in the co-main event of UFC Vegas 117 on Saturday. Santos had success in the opening round as he was landing power punches on Choi, and it even looked like he was going to finish Choi or dominate him for the entire fight. However, Choi turned things around and started landing jabs and counters. With 31 seconds left in the second round, Choi landed a body shot that crumbled Santos. In 9:29 of action, Santos landed 72 significant strikes. With the loss, Santos dropped to 13-3 as a pro and is now 4-2 in the UFC.

Malcolm Wellmaker suffered a second-round submission loss to UFC newcomer Juan Diaz on the main card of UFC Vegas 117 on Saturday. The opening round was competitive, but the ending sequence came in the second round after Diaz took Wellmaker down. With a minute left in the second round, Diaz dragged Wellmaker down and quickly submitted him with a rear-naked choke. In 9:08 of action, Wellmaker landed 15 significant strikes. This is Wellmaker's second loss in a row, after winning 10 consecutive fights. With the loss, Wellmaker dropped to 10-2 as a pro and is now 2-2 in the UFC.