Odds are one of Wisconsin, Iowa, and Nebraska will go 3-1 in the remaining games so it's probably going to take 3-1 with a loss to Ohio State to win it. Excluding OSU the remaining 3 games are somewhere around tossups so roughly a 1 in 8 chance. Not great but with how tough our schedule is this year and especially after the Northwestern loss I'll take it.
On paper Iowa should be the most likely, but with how much they rely on their defense and special teams to play lights out and make up for their lack of offense, any of their remaining opponents is just a couple of good plays away from beating them.