Marshall is expected to battle Reggie Howard for the nickelback position this season.
The Panthers have two draft picks still unsigned -- first-round pick DeAngelo Williams and fourth-round pick Nate Salley.
Players have to report to training camp this Friday. The first practice starts at 9:10 a.m. on Saturday and is open to the public.
Fresno State cornerback Richard Marshall gave the team an inside look at his confident persona in a…