Kimbo Slice defeated 51-year-old Ken Shamrock Friday night as a headliner for the Bellator 138 card with a right hook that busted Shamrock open above his eye. Before hitting Shamrock with that shot, Slice appeared to be in serious danger of losing the fight.

Shamrock took Slice, 41, down twice in the first round, and applied a rear naked choke on the second take down. He had Slice on the mat for a while, and appeared to have his choke hold locked in, but Slice refused to tap out. He eventually rolled out, got the fight standing again, and landed his knockout blow.

Shamrock has been billed as a submission master, and during the fight a graphic rattled off an impressive list of fighters Shamrock has submitted in his career. UFC commentator Joe Rogan thought that Slice’s ability to survive on the mat may have been a product of a setup rather than grit and will.

"That fight looked fake as f**k," Rogan said. "There's a couple things I don't like about that fight. I don't like that clinch. That long clinch that they had when they were mouth to ear. They were mouth to each other's ears for a long f***ing time.

"When Ken did take [Slice] down he never hit him once. How bout that? He never hit him. He had him down. He had him flattened out. He's not blasting him with punches. He's got him flattened out and he's not hitting him. That doesn't make any sense."

Rogan was sure to say that Slice’s knockout blow was authentic, although he did question whether Shamrock expected to take an actual blow like that.

"The other thing that got me was the way Kimbo stopped Shamrock," said Rogan. "That was real as f**k. I mean he definitely cracked him. So maybe they made an agreement and Kimbo said, 'I'm gonna punch this motherf***er anyway.'"