Jose Luis Castillo is hoisted onto his handlers' shoulders after his fourth-round knockout of Diego Corrales on Saturday night. Photo by ISAAC BREKKEN/REVIEW-JOURNAL

Given all the controversy that swirled around Jose Luis Castillo for the previous 24 hours, the last thing anyone would've expected from him Saturday was a dominating performance against his chief rival, Diego Corrales.

But this is boxing and the unexpected should always be expected. However, Castillo took the word "shock" to a new level when he knocked out Corrales with a big left hook 47 seconds into the fourth round of their scheduled 12-round bout at the Thomas & Mack Center.

"There's no way he's getting up this time," Castillo said after he dropped Corrales and gained a measure of revenge for his loss to him in May.

Castillo failed to make weight three times Friday for what was supposed to be a lightweight title fight. On Saturday, both fighters had ballooned to 147 pounds, well over the 135-pound limit at which they were supposed to fight.

The Nevada Athletic Commission fined Castillo $120,000 and barred his physician from ringside after he attempted to tamper with the scales during Friday's weigh-in at Caesars Palace.

That alone would have been enough to distract most fighters. But Castillo seemed to thrive from the controversy. He came into the ring a focused fighter, even though he had missed four days of training from a rib injury he suffered two weeks ago. That didn't slow him down either.

Perhaps the sore ribs motivated Castillo to get in and out of the ring quickly. He picked up where he left off from the previous encounter as he attacked Corrales. Corrales got in some good shots, too, but Castillo seemed determined to not let this opportunity get away. He was leading on all three judges' scorecards going into the fourth round.

Castillo and rival promoter Gary Shaw exchanged words a few hours before he climbed into the ring as Shaw, who handles Corrales, demanded Castillo get on the scale.

He eventually got on, weighed in at 147 and avoided any additional fines. He then proceeded to take care of business in the ring.

"I promised I would knock him out before seven rounds and I kept my promise," Castillo said.

Corrales made no excuses, though it could be said he was distracted from the events of Friday.

"I can only talk for myself," he said. "I take pride in what I do. I made the weight."

Castillo said he regrets what took place Friday when he put the fight in jeopardy with his failure to make weight and the subsequent shenanigans of his camp. But in the end, he once again showed that when it was time to fight, he was ready.

"I don't know if fortunately or unfortunately he made me mad," Castillo said of Corrales. "But I blocked everything else out and just concentrating on fighting him."