Isn't this an older rumor? Ether way, my guesses are...
StayingLB Brady Poppinga (who's going to beat him out for a back-up OLB position?)
TE Donald Lee (Quarless is a raw rookie, Havner is injured... I'm kind of hoping they keep four TEs for a year)
GoingCB Jarrett Bush (Underwood, Lee and Bell knock him off)
OT Allen Barbre (Bulaga was added and that's what knocks him off)
FB Hall (if he can't stay healthy)
FB Kuhn (if Hall can stay healthy)