He was never a great blocker, but made up for it enough due to his threat in the passing game. He's now much older and slower, so his big plays are primarily driven by Mahomes buying time via scramble, giving him more time to find an open zone and "squat."
He looks it, too. The guy looked like a strongman competitor in his prime and now sports a dad bod. It's unlikely he'd be an impact player anywhere else at this point.