Cornerback Richard Marshall stretches during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Cornerback Vincent Agnew goes up to catch a pass in drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Defensive end Olivier Vernon tries to rip the football from wide receiver Jeff Fuller in ball-possession drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21,2012. Joe Rimkus Jr. / Staff Photo
Defensive tackle Chas Alecxih, right, tries to rip the ball from running back Marcus Thigpen in ball-possession drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Wide receiver Davone Bess looks upfield after catching a pass in drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Cornerback Nolan Carroll, left, breaks up a pass intended for wide receiver Rishard Matthews in drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Dan Carpenter kicks a field goal during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Cornerback Trenton Hughes jumps in front of a pass intended for wide receiver B.J. Cunningham for an interception in drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Quarterback Ryan Tannehill works with the first team in drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Quarterback Ryan Tannehill hands the ball off to running back Daniel Thomas in 11-on-11 drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Wide receiver Chris Hogan catches a pass in drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Cornerback Kevyn Scott, who didn't participate in drills, works out with an elastic cord during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Head coach Joe Philbin listens to defensive coordinator Kevin Coyle during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Lamar Miller returns a punt during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Tight end Jeron Mastrud spikes the ball after scoring a touchdown during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Cornerback Richard Marshall stretches during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Quarterback Matt Moore points out the defense to linemen in drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Running back Reggie Bush moves between drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Cornerback Richard Marshall stretches during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Cornerback Richard Marshall participates in drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21,2012. Joe Rimkus Jr. / Staff Photo
Cornerback Richard Marshall goes up to intercept a pass in drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Quarterback Ryan Tannehill throws a pass in drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Quarterback Ryan Tannehill throws a pass in drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Tight end Jeron Marshall catches a pass as offensive coordinator Mike Sherman looks on during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Quarterback Ryan Tannehill sprints to the outside in drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Defensive end Jared Odrick tries to rip the football from wide receiver Chris Hogan in ball-possession drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Wide receiver Roberto Wallace catches a pass in drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Safety Jimmy Wilson and teammates stretch for the first part of practice inside the bubble at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Staff Photo
Running back Reggie Bush takes a break between drills during Miami Dolphins practice at Dolphins Training Camp in Davie on August 21, 2012. Joe Rimkus Jr. / Miami Herald Staff