Carolina Panthers' DeAngelo Williams (34) runs past Miami Dolphins' Gary Guyton (59) during the first quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Nell Redmond)

Carolina Panthers head coach Ron Rivera, right, talks with Miami Dolphins head coach Joe Philbin, left, before a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Bob Leverone)

Miami Dolphins quarterback Ryan Tannehill (17) throws a pass under pressure from Carolina Panthers' Charles Johnson (95) during the first quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Nell Redmond)

Carolina Panthers' Cam Newton (1) prepares to throw a pass against the Miami Dolphins during the first quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Bob Leverone)

Miami Dolphins' Marcus Thigpen (34) is hit by Carolina Panthers' Haruki Nakamura (43) as Panthers' Sherrod Martin (23) comes in during the first quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Bob Leverone)

Miami Dolphins' Ryan Tannehill (17) prepares to throw a pass against the Carolina Panthers during the first quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Chuck Burton)

Miami Dolphins' Sean Smith (24) intercepts a pass intended for Carolina Panthers' Steve Smith (89) during the first quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. Dolphins' Smith was called for pass interference on the play and the interception was overturned. (AP Photo/Nell Redmond)

Carolina Panthers' DeAngelo Williams (34) stretches the ball over the goal line for a touchdown as Miami Dolphins' Reshad Jones (20) defends during the first quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Chuck Burton)

Miami Dolphins head coach Joe Philbin reacts to a call during the first quarter of a preseason NFL football game against the Carolina Panthers in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Chuck Burton)

Carolina Panthers' Mike Tolbert, top, fumbles the ball as Miami Dolphins' Chris Clemons, bottom, defends during the second quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. Miami recovered the ball. (AP Photo/Bob Leverone)

Carolina Panthers' Mike Tolbert (35) breaks the tackle of Miami Dolphins' Nolan Carroll (28) during the second quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Bob Leverone)

Miami Dolphins' Daniel Thomas (33) falls into the end zone for a touchdown as Carolina Panthers' James Anderson (50) defends during the second quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Nell Redmond)

Miami Dolphins' Daniel Thomas (33) breaks the tackle of Carolina Panthers' James Anderson (50) during the second quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Nell Redmond)

Carolina Panthers head coach Ron Rivera argues a call during the third quarter of a preseason NFL football game against the Miami Dolphins in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Bob Leverone)

Carolina Panthers' Armanti Edwards (14) breaks the tackle of Miami Dolphins' Quinten Lawrence (36) during the third quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Bob Leverone)

Carolina Panthers' Jordan Senn (57) grabs the jersey of Miami Dolphins' Matt Moore (8) during the third quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Bob Leverone)

Miami Dolphins' Pat Devlin (7) throws a pass against the Carolina Panthers during the fourth quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. The Panthers won 23-17. (AP Photo/Bob Leverone)

Carolina Panthers' R.J. Stanford (25) gets a football from Charles Godfrey (30) after Stanford's interception of a Miami Dolphins pass during the fourth quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. The Panthers won 23-17. (AP Photo/Nell Redmond)

Miami Dolphins head coach Joe Philbin, left, reacts to a call during the first quarter of a preseason NFL football game against the Carolina Panthers in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Chuck Burton)

Carolina Panthers' DeAngelo Williams (34) runs past Miami Dolphins' Jason Trusnik (93) during the first quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Chuck Burton)

Carolina Panthers' Jonathan Stewart (28) leaps over teammates and the goal line for a touchdown against the Miami Dolphins during the first quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Bob Leverone)

Carolina Panthers' Cam Newton (1) hands the ball off to DeAngelo Williams (34) during the first quarter of a preseason NFL football game against the Miami Dolphins in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Chuck Burton)

Carolina Panthers' Jimmy Clausen looks up after being sacked during the fourth quarter of a preseason NFL football game against the Miami Dolphins in Charlotte, N.C., Friday, Aug. 17, 2012. The Dolphins were called for roughing the passer on the pay. The Panthers won 23-17. (AP Photo/Bob Leverone)

Aug 17, 2012; Charlotte, NC, USA; Carolina Panthers cheerleader performs during a timeout in the game against the Miami Dolphins at Bank of America Stadium. Mandatory Credit: Jeremy Brevard-US PRESSWIRE

Carolina Panthers' Cam Newton (1) hands a football to a fan after a Panthers touchdown against the Miami Dolphins during the first quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Chuck Burton)

Miami Dolphins' Ryan Tannehill (17) reacts after a teammate's touchdown against the Carolina Panthers during the second quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Bob Leverone)

Carolina Panthers' Olindo Mare (10) kicks a field goal against the Miami Dolphins during the second quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Nell Redmond)

Carolina Panthers' Cam Newton (1) rolls out against the Miami Dolphins during the first quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Bob Leverone)

Miami Dolphins' Chris Hogan (81) is tackled by Carolina Panthers' Kion Wilson (42) during the fourth quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. The Panthers won 23-17. (AP Photo/Bob Leverone)

Carolina Panthers' Jimmy Clausen (7) scrambles as Miami Dolphins' Isaako Aaitui defends during the fourth quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. The Panthers won 23-17. (AP Photo/Bob Leverone)

Carolina Panthers' Kealoha Pilares (81) runs past Miami Dolphins' Anderson Russell (40) and Tyrone Culver (29) during the second quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Bob Leverone)

Miami Dolphins' Matt Moore (8) throws a pass against the Carolina Panthers during the third quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Nell Redmond)

Carolina Panthers' Jimmy Clausen (7) calls a play against the Miami Dolphins during the third quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Chuck Burton)

Carolina Panthers' Derek Anderson (3) throws a pass against the Miami Dolphins during the third quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Nell Redmond)

Carolina Panthers' Cam Newton reacts after a teammate's touchdown against the Miami Dolphins during the first quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Nell Redmond)

The Carolina Panthers line up against the Miami Dolphins during the third quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Nell Redmond)

Carolina Panthers' Jimmy Clausen, top, loses his helmet as he is sacked by Isaako Aaitui, bottom, during the fourth quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. The Panthers won 23-17. (AP Photo/Bob Leverone)

Miami Dolphins' Dan Carpenter (5) kicks a field goal against the Carolina Panthers during the third quarter of a preseason NFL football game in Charlotte, N.C., Friday, Aug. 17, 2012. (AP Photo/Chuck Burton)