At the 7:50 min mark:
ESPN’s Jim Rome read to Lesnar some of the trash that Chael Sonnen has talked about the heavyweight champion, including Sonnen’s claim that “I’d slap you in your face and you wouldn’t do anything about it, Brock,” Lesnar had a simple retort: “I don’t know who he is.”
“Is he a fighter? I don’t know who he is,” Lesnar said. “I’m serious. Seriously.”