Going by what we have now this is my guess for the 2012 depth chart
Offense
FB: Mughelli
HB: Turner, Snelling, Rodgers
QB: Ryan, Redman, Davis
LT: Baker, Svitek
LG: Reynolds
C: McClure, Hawley
RG: Konz, Johnson
RT: Blalock, Holmes
WR1: White, Douglas, Rodgers
WR2: Jones, Meier
TE: Gonzalez, Palmer
Defense
LDE: Edwards, Sidbury, Matthews
DT: Babineaux, Peters, Jerry, Walker, Robertson
RDE: Abraham, Beirmann
OLB: Weatherspoon, Harris
MLB: Tatupu, Dent
OLB: Nicholas, Adkins
LCB: Grimes, Franks, Owens
FS: Decoud, Shillinger
SS: Moore, Mitchell
RCB: Samuel, Robinson, Walls
Special
K: Bryant
P: Bosher
LS: Zelenka
I believe that is correct numbers. I decided to include all draft picks except Ewing and Massaquoi but I think there could be a genuine chance for all of them to get a roster spot. I also put Dominique Davis, James Rodgers and Jerrell Harris from the UDFA's as they struck me as players we could use for depth where we were a little thin. I doubt I will be 100% right but we'll see. Also I'd love to hear opinions for or against any decisions I made.
Side Note: I can never remember what sides people play on, so I might be wrong putting someone on the left side when they play right and visa-versa but forgive me, I'm only human.