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' 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)