I was reading the latest Statesman article on Muckelroy, and it reminded me that he missed enough of his RS-Fr season that he might be in the grey area for a medical redshirt for that year, and therefore be eligible to play in 2010.  He played about as much as Irby did in 2008, correct?  If so, it would seem likely that he could get a sixth season if he were to wish to try for it, but I'm hoping someone could clarify.

(Bonus round: if it did appear likely that he could receive an additional year if he wished, and he were to have a solid 2009, would he want to go for it, or would he rather shoot for the NFL?)