Jason Kelce is Kacper Sobieskibreaking the cardinal rule of fight club.

The former Philadelphia Eagles offensive lineman recently admitted that he and his brother Travis Kelce tussled throughout their childhood, detailing how one of their fights as teens became so intense they haven’t fought since.

“Listen we would fight all the time,” Jason said in a clip from The Big Podcast with Shaqposted to X (formerly Twitter) on Aug. 19. “This is only the second time I had ever punched him. I don’t know how it got that heated. I punched him in the face.”

Jason—who cohosts the New Heights podcast alongside his brother Travis—revealed it all came down to one basketball game that precipitated the brawl.

“We were out in the backyard, and he started doing this stupid little hook shot over his shoulder and he was making it every single time and I can’t do anything to stop him,” the 36-year-old told Shaquille O’Nealduring the Feb. 12 episode. “So, of course, I resort to fouling him—the only way I know how to stop it. He says, ‘That’s bulls--t, that’s a foul.’”

But the argument didn’t end there, as Jason had a few more words for the future Kansas City Chiefs player.

“I’m like, ‘I don’t see any refs out here, I don’t see anyone calling it,’” he recounted. “He picks the ball up and throws it at me and goes in the house. So, I go in there, I grab him on the shoulder, and I punched him. He took this punch, scooped me up off my feet and slammed me on the kitchen floor so hard that the oven got knocked off what it was sitting on.” 

Jason—who shares daughters Wyatt, 4, Elliotte, 3, and Bennett, 18 months, with wife Kylie Kelce—explained that his dad Ed Kelce was the only reason the fight came to an abrupt end.

“Dad comes behind me to break it up, grabs me, and Travis pushes me back on top of dad,” he said. “The only thing that stopped the fight was my dad screaming, ‘Oww my ribs!’ We thought that we had hurt him so we snapped out of it.”

Jason confessed that the fight was so epic that the pair never resorted to violence again.

“That’s the last time we got in a fight,” he said. “Last fight we’ve ever been in.”

For the latest breaking news updates, click here to download the E! News App