Houston Texans tight end C.J. Fiedorowicz is contemplating retirement after suffering 3 concussions throughout the 2017 campaign.

Fiedorowicz spoke over the weekend about his situation.

“A dude knocked me out,” Fiedorowicz said, via Joe Stevenson of the Northwest (Ill.) Herald. “After eight weeks, when I came back, it was constantly on my mind. I wasn’t always able to play loose and free. It was in my head. Anytime that’s on your mind while you’re playing an NFL football game, you’re in trouble. You can’t play timid. Guys are trying to take your head off, you know?”

“You can’t go repair your brain,” Fiedorowicz said. “It’s not like an ACL or shoulder. That’s serious. I took some dingers. There was a couple of weeks there where I was having some tough times. This is what I’ve done my whole life, so to think that I’m going to walk away is tough. It’s not something that I thought of doing, because I signed the new deal, anytime soon. Life goes on, whatever happens.”

Fiedorowicz signed a three-year, $21.5 million contract last offseason.