During his 20-year NFL career, Hall of Fame wide receiver Jerry Rice was a cool customer—and thanks to his casual excellence, the San Francisco 49ers won three Super Bowls in 1988, 1989 and 1994.

On Friday, however, Rice appeared to lose his cool with two reporters during the first round of the American Century Championship golf tournament in Stateline, Nev..

TMZ obtained footage of the reporters asking Rice whether he thought the Kansas City Chiefs had a good enough core of wide receivers to win their third straight Super Bowl. Taking exception, Rice stormed over and told the journalists, “I will f— you up!”

The confused reporters—representing Starcade Media in Kansas City—expressed confusion and insisted they meant no harm. Rice told TMZ he believed the reporters intended to slight him, given the 49ers’ loss to the Chiefs in February’s Super Bowl.

“I’m going to defend the San Francisco 49ers,” Rice said. “This is my history.”

Rice is tied with Tampa Bay Buccaneers quarterback Baker Mayfield for 77th at the end of the celebrity tournament’s second round.