Assuming OSU goes 13-0 and goes to the playoffs, you got to figure Minny is close to a lock for the Rose Bowl. Even if they drop 1 game to either Iowa or Wiscy, as long as they don't lose to both of them, they are headed to Pasedena.
If it comes down to 11-2 Minny vs 10-2 PSU, the Rose Bowl almost has to pick Minny due to its H2H win against PSU.