Floyd Mayweather Jr. dropped Victor Ortiz in the 4th round Saturday night to claim the WBC welter belt and remain unbeaten.

The end came at the 2:59 mark of the round just after the two fighters emerged from a break, in which Ortiz had embraced Mayweather in the center of the ring. As they broke Mayweather shot out a left hand and followed it with a right that put Ortiz down in his corner.

Ortiz struggled to get up and referee Joe Cortez ended up calling the fight.

We touched gloves and we were back to fighting and then I threw the left and right hand after the break,” Mayweather said. “In the ring you have to protect yourself at all times.”

The round was already clouded in controversy as Ortiz appeared to intentionally head butt Mayweather, prompting Cortez to take away a point.

Seconds later they were back in the center of the ring when Mayweather’s quick two punches ended it. Mayweather was winning the fight through three rounds, using his dominate speed and right hand that’s gotten him to where he is.

To read a full recap click here.