UFC fighter Ryan Spann opened up about sparring former NBA player Deron Williams in the gym, and Spann told TMZ that Williams "whooped my ass." 

While speaking about sparring Williams, Spann stated, "I was training for a fight, and coach was like, 'Deron, get in.' And, I already knew he hooped, and I knew who he was, but I never got to go with him. I think it was my 2nd or my 3rd round with a fresh body, and you put Deron in, I was like, 'Oh s**t, nice, I get a round off.' Little did I know Deron used to wrestle. And, he was about 230 at the time."

Spann added, "It wasn't until Deron was on top of me and me struggling to get up, and coach gonna look at me and say 'I've been working with him for the last couple of years. You thought you were gonna get this round off?'" 

Check out more of what Spann had to say, including how Williams hasn't wanted to spar with him since he came back during the sparring session, hit the above clip.