Isnt this the whole point behind the Legands patch? They want to get away from retiring numbers because they dress something like 120 players for home games and it gets tough once you retire 10 plus numbers (ala #21 and #2 in the future). So they will un-retire the numbers with permission and then only give them out to deserving player.
"He makes it really easy on you as a coach because he has tremendous football instincts," Michigan tight ends coach Jay Harbaugh said. "Things come really naturally to him. He doesn't have to see things too many times. He has a good sense for how things should look and feel, and he's a tough, physical guy."