A lot, actually:
2016 - Hank Ekpe, Jalen Myrick, Drew Wolitarsky (How much would these guys be helping us right now?)
2015 - Scott Ekpe, Antonio Johnson, Alex Keith, K.J. Maye, Eric Murray, Lincoln Plsek, Damarius Travis (Would we have won a Big Ten division title in 2016 with all of these guys as 5th-year seniors?)
2014 - Michael Amaefula, David Cobb, Drew Goodger, Marcus Jones, Grayson Levine, Tommy Olson, Cedric Thompson, Derrick Wells (Do we win 6 in 2015 and not have people bitch about academically qualifying for a bowl game?)
2013 - Ra'Shede Hageman, Aaron Hill, Donnell Kirkwood, James Manuel, Ed Olson, Brock Vereen (Again, do we win a Big Ten division title in 2014 with all of these guys as 5th-year seniors? We were a half against Wisconsin away from doing so.)
2012 - Michael Carter, Keanon Cooper, Ryan Grant, MarQueis Gray, D.L. Wilhite
I could keep going, but I've made my point. When you're trying to establish a consistently competitive team, nothing will do it like having a bunch of 22- and 23-year-olds at the top of the depth chart every year. We haven't had that, because we keep mortgaging the future for the present, and the cycle continues. I've had a lot of beef with the way Fleck is doing many things, but one thing I unequivocally applaud him for is trying to keep as many redshirts on as possible. We will be consistently competing for Big Ten titles beginning in 4-5 years if he manages to redshirt the overwhelming majority of freshmen each year.