LOUISVILLE, Ky. — Mike Tyson was knocked out in the fourth round Friday night in a shocking end to the latest comeback of the fighter who once was the most feared heavyweight of his era.

Unheralded British heavyweight Danny Williams landed a flurry of punches that sent Tyson sprawling into the ropes, perhaps ending his career with the same kind of fury that Tyson once unleashed on other fighters.

Williams, a heavy underdog, improved to 32-3 with 27 knockouts. Tyson, who was hoping to fight often and improbably regain his former glories to get out of millions in debt, fell to 50-5-2 with 44 KOs. The loss was Tyson’s first in 41 non-title fights.

Williams immediately proposed to his longtime fianc�e, Zoe, the mother of his two daughters, who accepted, and not because the Englishman made a $350,000 purse tonight with a lot more to come.

“Williams was laying on him,” said Tyson’s trainer, Freddie Roach. “I think it wore him out. He had a great amount of firepower. Mike moved his head well, threw a lot of good combinations, but Williams has a lot of heart. He took a lot of hard punches.”

The fighter once called the baddest man on the planet went down from a final right hand, then laid helplessly along the ropes, blood streaming down his face. Tyson tried to get up to beat the count, then fell down again and the fight was waved to a stunning close at 2:51 of the fourth round.

Damn, that may be all she wrote for Tyson, buddy been on a real loosing streak…