San Diego Chargers coach Norv Turner works with receiver Dante Rosario on his passing route during practice at NFL football training camp, Thursday, July 26, 2012, in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers wide receiver Malcom Floyd battles defensive back Quentin Jammer after catching a pass during practice at NFL football training camp, Thursday, July 26, 2012, in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers defensive back Atari Bigby uses his shirt to wipe away the sweat during practice at NFL football training camp, Thursday, July 26, 2012, in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers wide receiver Phillip Payne pulls in a pass during practice at NFL football training camp on Friday, July 27, 2012, in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers quarterback Kyle Boller, right, throws a pass as coach Norv Turner watches during practice at NFL football training camp on Friday, July 27, 2012, in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers quarterback Philip Rivers loses his grip on the ball while trying to throw a pass during practice at the Chargers' training camp Friday, July 27, 2012 in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers wide receiver Micheal Spurlock battles strong safety Brandon Taylor for the ball during NFL football training camp, Tuesday, July 31, 2012, in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers running back Michael Hayes gets a straight arm into the face of San Diego Chargers defensive back Eric Weddle during practice at the Chargers' training camp Tuesday, July 31, 2012 in San Diego. (AP Photo/Lenny Ignelzi)