Here's who we will lose that are key players:
Tristan Davis, SR
Tez Doolittle, SR
Robert Dunn, SR (not sure if he has a year left or not, might need to double check)
Chris Evans, SR (a backup LB, has played on Special Teams some)
Merrill Johnson, SR
Brad Lester, SR
Rod Smith, SR (he might have one year left too, not sure)
I have not heard any talk about JR's or SO's that might want to declare for the draft early. I left off some other seniors who aren't key players.