Looking at the UM football roster for 2009, there's always some doubling up of jersey numbers. For example, QB Tate Forcier wears No. 5 on offense and DB Vlad Emilien wears No. 5 on defense.
These are the available "quarterback jersey numbers" available to incoming freshman QB Denard Robinson:
(Personally I'd love to see a QB wear this number, but I know this is a sore subject for many fellow UM fans because of the Braylon Edwards scholarship and short-term memory issues.)
Donovan Warren wears No. 6 on defense. That leaves an offensive player with an opportunity to wear it.
Steven Threet left. This number appears to be available for an offensive and defensive player in 2009.
Of course, Morgan Trent graduated. Number appears to be available for an offensive and defensive player in 2009.
Zac Combs has it for FS position. Leaves open opportunity for an offensive player. If Mr. Jason Forcier comes back, maybe he'd like it back?
Personally I'd love to see Denard wear No. 1.
But I believe it will be No. 10 or No. 6.