If you don't have Platebreaker in your hand by turn 5 and Brawl by turn 7, you'll lose. It may be a good idea to mulligan for one of them. Even then, it's pretty hit and miss. I don't know if the Frothing Berserker + Whirlwind combo is feasible in this fight, but it's in the deck. When I finally won, it was with Grommash Hellscream + Whirlwind, with a Fiery War Axe to finish him off. This deck could probably be a lot better, but this is what I was able to come up with with the cards I have.