San Diego Chargers quarterback Philip Rivers launches a pass during NFL football training camp Thursday, Aug. 4, 2011, in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers wide receiver Vincent Jackson pulls in a pass during NFL football training camp Thursday, Aug. 4, 2011, in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers tight end Antonio Gates pulls in a pass during NFL football training camp Thursday, Aug. 4, 2011, in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers quarterback Scott Tolzien, left, throws as quarterbacks coach John Ramsdell watches during NFL football training camp Tuesday, Aug. 9, 2011, in San Diego. (AP Photo/Gregory Bull)

San Diego Chargers first round draft choice Corey Liuget, who signed a contract early Thursday, chases a runner during his first practice at NFL football training camp Thursday, Aug. 4, 2011 in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers first round draft choice Corey Liuget, who signed a contract early Thursday, attends his first practice during NFL football training camp Thursday, Aug. 4, 2011, in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers tight end Kory Sperry makes a catch during drills at NFL football training camp on Thursday, Aug. 4, 2011, in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers fullback Mike Tolbert, left, runs past cornerback Traye Simmons during NFL football training camp Thursday, Aug. 4, 2011, in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers running back Ryan Mathews races through the defense during a scrimmage atNFL football training camp Thursday, Aug. 4, 2011, in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers quarterback Philip Rivers throws a pass during NFL football training camp Thursday, Aug. 4, 2011, in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers quarterback Philip Rivers (17) warms up during the first day of NFL football training camp in San Diego, Thursday, July 28, 2011. (AP Photo/Chris Carlson)

San Diego Chargers quarterback Philip Rivers, left, throws to tight end Kory Sperry during the first day of NFL football training camp in San Diego, Thursday, July 28, 2011. (AP Photo/Chris Carlson)

San Diego Chargers center Nick Hardwick, right, jokes with quarterback Philip Rivers during first day of the NFL football team's training camp in San Diego, Thursday, July 28, 2011. (AP Photo/Chris Carlson)

San Diego Chargers tight end Antonio Gates, foreground, works out during the first day of NFL football training camp in San Diego, Thursday, July 28, 2011. (AP Photo/Chris Carlson)

San Diego Chargers head coach Norv Turner looks on during the first day of NFL football training camp in San Diego, Thursday, July 28, 2011. (AP Photo/Chris Carlson)

San Diego Chargers quarterback Philip Rivers, right, throws during the first day of NFL football training camp as head coach Norv Turner looks on in San Diego, Thursday, July 28, 2011. (AP Photo/Chris Carlson)

San Diego Chargers tight end Antonio Gates takes a break during the first day of the NFL football team's training camp in San Diego, on Thursday, July 28, 2011. (AP Photo/Chris Carlson)

San Diego Chargers quarterback Philip Rivers, right, hands off to running back Ryan Mathews during the first day of NFL football training camp in San Diego, Thursday, July 28, 2011. (AP Photo/Chris Carlson)

San Diego Chargers running back Ryan Mathews makes catch during the first day of NFL football training camp in San Diego, Thursday, July 28, 2011. (AP Photo/Chris Carlson)

San Diego Chargers defensive coodinator Greg Manusky runs a drill during the second day of their NFL training camp in San Diego, Friday, July 29, 2011. (AP Photo/Denis Poroy)

San Diego Chargers quarterback Phillip Rivers (17) throws a pass during the second day of NFL football training camp in San Diego, Friday, July 29, 2011. (AP Photo/Denis Poroy)

San Diego Chargers tight end Kory Sperry stretches during the second day of NFL training camp in San Diego, Friday, July 29, 2011. (AP Photo/Denis Poroy)

San Diego Chargers running back Isaac Odim (41) runs a play during the second day of the NFL football team's training camp in San Diego, Friday, July 29, 2011. (AP Photo/Denis Poroy)

San Diego Chargers quarterback Phillip Rivers (17) takes a break next to backup quarterback Scott Tolzien during the second day of their NFL training camp in San Diego, Friday, July 29, 2011. (AP Photo/Denis Poroy)

San Diego Chargers head coach Norv Turner, left, talks with quarterback Philip Rivers (17) during the second day of NFL training camp in San Diego, Friday, July 29, 2011. (AP Photo/Denis Poroy)

San Diego Chargers tight end Antonio Gates runs a drill during the second day of their NFL training camp in San Diego, Friday, July 29, 2011. (AP Photo/Denis Poroy)

San Diego Chargers guard Louis Vasquez drinks during the second day of NFL training camp in San Diego, Friday, July 29, 2011. (AP Photo/Denis Poroy)

San Diego Chargers head coach Norv Turner calls out a play during the second day of their NFL training camp in San Diego, Friday, July 29, 2011. (AP Photo/Denis Poroy)

San Diego Chargers wide receiver Vincent Brown makes a catch during the second day of theur NFL football training camp in San Diego, Friday, July 29, 2011. (AP Photo/Denis Poroy)

San Diego Chargers head coach Norv Turner, left, talks with quarterback Philip Rivers during NFL football training camp in San Diego, Friday, July 29, 2011. (AP Photo/Denis Poroy)