James Toney stopped Michael Nunn with a thunderous left hook in the 11th round to win the International Boxing Federation middleweight title Friday night.

It was the first loss in 37 fights for Nunn, who just had to stay up to retain his title.Toney, 22, of Detroit, improved to 26-0-1.

Nunn, making his sixth title defense, appeared to be in command, throwing effective jabs and using quick footwork to escape Toney's barrages. But Toney, ranked fifth by the IBF, decked Nunn in the middle of the ring in the 11th round after firing a wild right seconds earlier that almost sent him through the ropes.

Nunn, from Davenport, sprawled on his back and got up after an eight count. He then retreated to the neutral corner, where Toney again unloaded with a combination of rights and lefts. Nunn's knees buckled, his corner threw a white towel into the ring and referee Denny Nelson stopped the fight at 2:24.