According to an article by Aaron Wilson at National Football Post, the Panthers recently held tryouts for 15 players.
Per Wilson, citing league sources, those players are:
quarterback Austin Davis, tight end Jake O'Connell, fullback-tight end Dorin Dickerson ... defensive backs Al Afalava, Tom Nelson, Sean Cattouse and Chaz Powell, tight ends LaMark Brown, Cameron Graham, offensive linemen Oscar Johnson, James Nelson and J.B. Shugarts, wide receiver Cordell Roberson and linebackers Lee Robinson and Pat Schiller
At this time, none of the players have been signed.
I understand the need to try out defensive backs since the Panthers are razor thin in that position group. I also see the need to try out offensive linemen because the current group we have should give us all fear for Cam Newton's longevity. What I don't understand is the team's need and/or desire to try out quarterbacks, tight ends and linebackers. Unless they just wanted to have some offensive players to help run drills to better gauge the value of the offensive linemen and defensive backs, bringing in those extra players doesn't make that much sense.
At any rate, you probably shouldn't wait on the edge of your seat for any of these guys to be signed, as it's highly unlikely we see any of them in a uniform at any point this season.
Stay tuned though, because if any of them are brought on board we'll be sure to give you all the details.