LAS VEGAS -- Daniel Cormier won't be crying after this performance.
Cormier (14-0) needed just 79 seconds to knock out late replacement Patrick Cummins at UFC 170 on Saturday at the Mandalay Bay Events Center.
It was a sweet result for Cormier, who was making his debut at light heavyweight. Prior to the bout, Cummins (4-1) had claimed he had made Cormier cry once during a wrestling practice when the two trained together years ago.
"It had to happen this way," Cormier said. "It could not have gone the distance. I'm mad he even hit me twice because of all the talking he did.
"When you talk, you've got to be able to back it up. That's what I do."
Cummins didn't appear blatantly out of his league, despite the fact Cormier closed at a near 12-to-1 betting favorite. He accepted the fight on 10 days' notice, when injury forced Rashad Evans off the co-main event.
"I feel good because it's my first finish in UFC," Cormier said.
"Training camp was long and hard and I prepared for a long fight but I have no complaints. I'm going to stay in this cycle and be this healthy in every camp. I feel great with this nutrition and the way my body has reacted to it. I'm firing on all cylinders. I've been talking about this move down for a long time, and when you do it the right way you don't feel any effects. I don't want to make this harder than it needs to be. I've got great coaches and I know I haven't peaked yet. I'm going to keep getting better and I'm taking on all comers."
He attempted several takedowns in the opening minute and had no trouble letting his hands go -- but he never came close to taking down Cormier.
Cormier forced a fight in close quarters. He ate a counter left at one point (one of the two punches he referenced immediately afterward), but that did little to back him off.
About one minute in, Cormier staggered Cummins with a short right to the chin. He followed it with a picture-perfect uppercut that sent Cummins' eyes rolling.
The former NCAA All-American wrestler attempted to recover, but there was no way Cormier was letting him off the hook. He swarmed with more right hands, which prompted referee Mario Yamasaki to stop the fight.
Cummins, who signed a multifight deal with the UFC, suffered his first professional loss.
MacDonald (16-2) surrendered a takedown in the first minute, which led to him losing the first round, but he was solid otherwise. He picked Maia apart on the feet while defending a constant string of takedown attempts in the later rounds.
All three judges scored it the same, 29-28 for MacDonald.
Maia (19-5) could not have gotten off to a better start. He took MacDonald down immediately with a high single leg and advanced to full mount within two minutes.