Without a significant change to his physical make-up, he is, yes.
He'd be foolish to fight at HW and weigh in at anything under 240 (nobody inside the top 15 at HW fights at under 240 these days, bar old man Olynik), but to reach that weight and be in fight shape in the process, he'd have to add significant muscle. And who knows how that will affect his movement and gas tank. And what is the point/payoff? He doesn't have any losses to avenge, and I doubt he's concerned one iota whether Sherdoggers think he's "ducking".