McCall tko in round 5. Haye would be running for his life after throwing every punch in his arsenal with zero effect. The bull catches him and batters him until the corner calls it quits.
McCall is getting old. Which isn't helping much. Haye could probably maybe TKO him, but never in his earlier days.
mcall gets hit early and keeps coming, and coming, and smaller haye is forced to lift his punch rate to try and keep mccall away, haye tries and mcall tko's him late
Haye would stop McCall. I don't think he'd be seriously hurt, but based on punch accumlation, the ref would call it quits in around 9 rounds.