I'd try and bring in:
Mark Herzlich (ILB-Boston College)
Guys probably going to get a lot of calls. He was a beast before the chemo and if he gets his body right, which I think he can, he's going to be a good player. Assuming Barnett's gone, Chillar and DJ Smith are the only ILBs left to compete for the two backup spots.
Derrick Locke (RB/WR/KR-Kentucky)
Cobb's brother in arms. Another guy who's a threat to score everytime he touches the ball. He was lined up at Receiver at times and showed he has skills there. He's an amazing returner at the very least. 4.37 40: 27 Yards per Return

Jarriel King (T/G South Carolina)
It should be Packers policy to protect Rodgers to the best of our ability and that meanns bringing in lineman that have a chance to be good players. Even if King never starts, he might beat out a backup which as we've seen from last year are important.
Terrence Toliver (WR-LSU)
With Driver nearing the end a good receiver to replace him would be very nice. Toliver's got some skills but he's raw. A year working with procoaches would do him a lot of good. He's 6'5 203, and ran a 4.5 40. He's a potential deep threat for Rodgers to hit downfield
Derek Hall (T-Stanford)
He's a project Olineman with some potential. Great size and he's smart, just needs to work on technique. Toss him on the practice squad and work with him and he may become something in the future.
Pat Devlin (QB-Delaware)
If this CBA thing ever gets worked out, we should swap Flynn for a pick in next year's draft. Most teams have a 3rd QB, and Devlin drew comparisons to Flacco (though most of that is from his height and that he's going to Delaware)
Ian Williams (NT-Notre Dame)
Williams is an athletic big guy who's got a lot of potential. He could hopefully let Raji rest for a few plays a game. Another season like last one and Raji's going to be down to 280 pounds.