Johnny Jolly - Probably best suited to be a DE, but could work as a DT. I think a poor mans Haloti Ngata at best as he could alternate positions.
Ryan Pickett - I don't think he can play the nose tackle to a high level. I think he'd be average at best. Can he gain weight and stay in shape? I don't think so.
Cullen Jenkins - He'll need to get stronger to be a DE in the 3-4. He's more suited to be a cover 2 DT. None the less he has the size to do it. Again get stronger in the off season and he could do it.
Aaron Kampman - I think Kampman has the rare ability to learn just about anything that isn't unrealistic. With that said, he' has an uphill battle as he's a 4-3 DE. That's his best position. We'll see.
Jeremy Thompson - He's a raw player so with good coaching I could see him as a pass rushing outside linebacker. A project that could come out of know where in a year if this works.
A.J. Hawk - I think he could thrive as a 3-4 inside backer because he was able to penetrate in college so well and in the 3-4 he could be used to blitz properly through the middle, but he really needs to be taught how to blitz. He's awful at it right now and that's not good.
Nick Barnett - Think Jerod Mayo in New England at best, but in reality he's so undersized that at times he could get lit up. He'll need to be more disciplined. He's an inside backer obviously. I think he'll work as long as he's healthy.
Jason Hunter - An excellent fit for the 3-4 defense. Probably a favorite on paper to start at one of the outside linebacker spots or at least be a key pass rusher.
Brady Poppinga - Fits as an outside linebacker, but is awful at blitzing. He'll need to learn to blitz better and timing is key in the 3-4 and he doesn't have that when he blitzes.
Desmond Bishop - High motor player who could probably work as an inside linebacker in the 3-4.
Brandon Chller - Not much of a pass rusher and honestly I could see him playing either inside or outside. He has the size and skill set, but I see him as an odd man out right now.
Alfred Malone - Probably a DE in the 3-4. Honestly I haven't watched him play that much, but he might be strong enough to do it. Wish he had a taller frame.
Danny Lansanah - On paper he looks like an inside backer in the 3-4. Ideal size for it.
My guess is Ted Thompson already has a depth chart projected up in his office by now and it probably looks something like this.....
DE Johnny Jolly/Justin Harrell/Alfred Malone
DT Ryan Pickett/Johnny Jolly/Justin Harrell
DE Cullen Jenkins/Justin Harrell/Alfred Malone
OLB Aaron Kampman/Brandon Chiller/Jeremy Thompson
ILB A.J. Hawk/Desmond Bishop/Brandon Chiller
MLB Nick Barnett/Desmond Bishop/Danny Lansanah
OLB Jason Hunter/Brady Poppinga/Brandon Chiller
You're probably looking at a DE, OLB, and NT as your priorities this off season on the defensive side of the ball.