Michigan B1G Program Loses Starter To Retirement Published February 12, 2019 Wisconsin center/guard Jon Dietzen announced his retirement due to injuries from college football: pic.twitter.com/23N0axftxy — Dietzen (@DietzenJon) February 11, 2019 In this article: Recent Posts Five-Star WR Trending Maize And Blue With Michigan Visit Upcoming? OSU Loses Out On Top In-State Recruit To ACC Program Positive Rumblings In Michigan’s Pursuit Of A Five-Star QB Michigan Predicted To Land Elite ’26 TE Recruit Michigan QB Announces Transfer Destination