In this scenario?  Right now you have Iowa and Wisconsin sitting at 6-2.  Minnesota and Purdue are both 5-3.

Minnesota plays Wisconsin this week if they win that puts them both at 6-3.

Iowa plays Nebraska(wins) which if they pull off the miracle Iowa is also 6-3.

Purdue plays Indiana which I see them winning which also puts them at 6-3.

That puts 4 teams tied for first with a 6-3 record, anyone know all the tiebreakers involved as I've only seen them for a 2 way tie for 1st on who gets the nod into the BIG Championship game.  Really don't want a rematch of a team we already played.