QB (2) - Aaron Rodgers, Brett Hundley
RB (4) - Eddie Lacy, James Starks, Aaron Ripkowski, waiver pickup at final cutdown
WR (6) - Jordy Nelson, Randall Cobb, Davante Adams, Ty Montgomery, Jeff Janis, Trevor Davis
TE (4) - Richard Rodgers, Jared Cook, Justin Perillo, Kennard Backman
OL (9) - David Bakhtiari, Bryan Bulaga, Josh Sitton, T.J. Lang, Corey Linsley, J.C. Tretter, Lane Taylor, Jason Spriggs, Kyle Murphy
DL (6) - Mike Daniels, Letroy Guion, Kenny Clark, Josh Boyd, Dean Lowry, Mike Pennel
LB (10) - Julius Peppers, Nick Perry, Clay Matthews, Jake Ryan, Datone Jones, Kyler Fackrell, Jayrone Elliott, Sam Barrington, Blake Martinez, Joe Thomas
DB (9) - Sam Shields, Damarious Randall, Morgan Burnett, Ha Ha Clinton-Dix, Quinten Rollins, LaDarius Gunter, Robertson Daniel, Micah Hyde, Chris Banjo
ST (3) - Mason Crosby, Tim Masthay, Rick Lovato
The Packers probably carry three running backs and I'd guess the third one isn't on the roster yet. Good chance that one is claimed from another team at final cuts. It really wouldn't be that surprising if the Packers elected to start the season with only two running backs if McCarthy plans to give Cobb/Montgomery approximately 12 snaps per game in the backfield. The Packers carried Alonzo Harris as the third back for a good percentage of last season and he was the equivalent of a practice squad player, so they could just figure the third running back is the top running back they have on the practice squad. All that said, I'd still predict they keep a third back who is currently on another team's roster. If they would decide to only keep 2 running backs, then add Jared Abbrederis to the wide receiver list.
Christian Ringo begins the regular season on the 53 man roster and Mike Pennel replaces him once his suspension ends.
There will be at least one undrafted free agent that will make the roster but until they get a couple weeks into the pre-season it is just about impossible to guess who that player might be. Currently I'd say DB only because LaDarius Gunter and Robertson Daniel are probably the players most likely to lose their spot. While Pennel survives, Demetri Goodson's suspension has probably earned him a ticket out of town.