EXCLUSIVE CONTENT Get ESPN+ Michigan and six other undefeated teams facing prove-it games this weekFacebookTwitterFacebook MessengerEmailSep 28, 2021Adam RittenbergESPN Senior Writer Close College football reporter. Joined ESPN.com in 2008. Graduate of Northwestern University.Follow on TwitterFacebookTwitterFacebook MessengerPinterestEmailThere are certain games on every team's schedule that provide clear markers of progress. For Michigan, this week's trip to Wisconsin was always going to be that game in 2021.
