Michigan's starting quarterback in 2015, Jake Rudock, was a transfer.
Their starter in 2016 could be a transfer, as well.
That player, John O'Korn, tops the list compiled by Andrea Adelson of ESPN on the transfers who stand to make the biggest impact next season.
Adelson: "O'Korn sat out 2015 because of NCAA transfer rules and is primed to take over for outgoing senior Jake Rudock. At Houston, O'Korn threw for more than 3,000 yards and was American Athletic Conference Freshman of the Year in 2013. Given the lofty expectations for the Wolverines in 2016, O'Korn could follow Oklahoma's Baker Mayfield and Alabama's Jake Coker as transfer quarterbacks to make the playoff."
O'Korn should face the most competition for Michigan's starting job from Shane Morris. Wilton Speight, Zach Gentry and Alex Malzone could be in the mix, as well, and early-enrollee freshman Brandon Peters is expected to redshirt.
Here are the other impact transfers, according to Adelson:
2. QB Trevor Knight, Oklahoma to Texas A&M
3. QB Dakota Prukop, Montana State to Oregon
4. RB Duke Catalon, Texas to Houston
5. DL Gerald Willis, Florida to Miami
6. WR Geno Lewis, Penn State to Oklahoma
7. QB Luke Del Rio, Oregon State to Florida
8. QB Kenny Hill, Texas A&M to TCU
9. QB Riley Ferguson, Coffeyville Community College to Memphis
10. DB Priest Willis, UCLA to Texas A&M