Carolina Panthers head coach Ron Rivera, right, talks with running back DeAngelo Williams, left, during practice at NFL football minicamp in Charlotte, N.C., Wednesday, June 12, 2013. (AP Photo/Chuck Burton)
Carolina Panthers' Cam Newton, left, greets Luke Kuechly, right, during the NFL football team's minicamp practice in Charlotte, N.C., Wednesday, June 12, 2013. (AP Photo/Chuck Burton)
Carolina Panthers running back Jonathan Stewart looks on from the sidelines during practice at NFL football minicamp in Charlotte, N.C., Thursday, June 13, 2013. Panthers quarterback Cam Newton and coach Ron Rivera feel the Panthers need to get their running backs more involved in the offense this year. (AP Photo/Chuck Burton)
Carolina Panthers' Cam Newton runs a drill during the NFL football team's minicamp practice in Charlotte, N.C., Tuesday, June 11, 2013. (AP Photo/Chuck Burton)
Carolina Panthers head coach Ron Rivera looks on as players stretch during the NFL football team's minicamp practice in Charlotte, N.C., Thursday, June 13, 2013. Rivera and Panthers quarterback Cam Newton feel the Panthers need to get their running backs more involved in the offense this year. (AP Photo/Chuck Burton)
Carolina Panthers' Ted Ginn Jr (19) catches a pass during practice at NFL football minicamp in Charlotte, N.C., Wednesday, June 12, 2013. (AP Photo/Chuck Burton)
Carolina Panthers running back Tauren Poole (33) catches a pass during the NFL football team's minicamp practice in Charlotte, N.C., Thursday, June 13, 2013. Panthers quarterback Cam Newton and coach Ron Rivera feel the Panthers need to get their running backs more involved in the offense this year. (AP Photo/Chuck Burton)
Carolina Panthers head coach Ron Rivera, right, talks with Jordan Gross, left, during the NFL football team's minicamp practice in Charlotte, N.C., Tuesday, June 11, 2013. (AP Photo/Chuck Burton)
Carolina Panthers running back DeAngelo Williams (34) stretches during the NFL football team's minicamp practice in Charlotte, N.C., Thursday, June 13, 2013. Panthers quarterback Cam Newton and coach Ron Rivera feel the Panthers need to get their running backs more involved in the offense this year. (AP Photo/Chuck Burton)
Carolina Panthers quarterback Cam Newton runs a drill during the NFL football team's minicamp practice in Charlotte, N.C., Thursday, June 13, 2013. Newton and coach Ron Rivera feel the Panthers need to get their running backs more involved in the offense this year. (AP Photo/Chuck Burton)
Carolina Panthers quarterback Cam Newton shares a laugh with teammates during the NFL football team's minicamp practice in Charlotte, N.C., Thursday, June 13, 2013. Newton and coach Ron Rivera feel the Panthers need to get their running backs more involved in the offense this year. (AP Photo/Chuck Burton)
Carolina Panthers' Ted Ginn Jr, right, talks with Domenik Hixon, left, and assistant receivers coach Ricky Proehl, center, during practice at NFL football minicamp in Charlotte, N.C., Wednesday, June 12, 2013. (AP Photo/Chuck Burton)
Carolina Panthers running back DeAngelo Williams (34) runs a drill during practice at NFL football minicamp in Charlotte, N.C., Thursday, June 13, 2013.Panthers quarterback Cam Newton and coach Ron Rivera feel the Panthers need to get their running backs more involved in the offense this year. (AP Photo/Chuck Burton)
Carolina Panthers' Ted Ginn Jr (19) runs after catching a pass during practice at NFL football minicamp in Charlotte, N.C., Wednesday, June 12, 2013. (AP Photo/Chuck Burton)
Carolina Panthers' Jeff Mueller films from a perch above the practice fields and in the shadow of the Bank of America headquarters during practice at NFL football minicamp in Charlotte, N.C., Wednesday, June 12, 2013. (AP Photo/Chuck Burton)
Carolina Panthers' Greg Hardy reacts during the NFL football team's minicamp practice in Charlotte, N.C., Tuesday, June 11, 2013. The Panthers outspoken fourth-year player said Tuesday he plans to report to training camp on time and play this season even if he doesn't get a new contract from the Panthers. (AP Photo/Chuck Burton)
Carolina Panthers' Ted Ginn Jr. (19) stretches during an NFL football minicamp in Charlotte, N.C., Wednesday, June 12, 2013. (AP Photo/Chuck Burton)
Carolina Panthers' Cam Newton reacts during the NFL football team's minicamp practice in Charlotte, N.C., Tuesday, June 11, 2013. (AP Photo/Chuck Burton)
Carolina Panthers' DeAngelo Williams, right, runs with the ball as Mike Tolbert, left, runs along during the NFL football team's minicamp practice in Charlotte, N.C., Wednesday, June 12, 2013. (AP Photo/Chuck Burton)
Carolina Panthers' Greg Hardy (76) gives a fist bump to a coach during the NFL football team's minicamp practice in Charlotte, N.C., Tuesday, June 11, 2013. The Panthers outspoken fourth-year player said Tuesday he plans to report to training camp on time and play this season even if he doesn't get a new contract from the Panthers. (AP Photo/Chuck Burton)
