Rooting for Michigan, I root for any team that beats OSU.
If it's a high scoring game (over 55 points total) I think Washington would win a shoot out. I expect Mich to do everything it can to keep the Wash offense off the field by bleeding the play clock and keeping the ball on the ground. I didn't bet on the game, but if pressed for a prediction, I'd say Mich 27-17.