Houston Texans quarterback David Carr throws a pass during the first quarter of an NFL football game against the Cleveland Browns in this Dec. 31, 2006 file photo, in Houston. The Houston Texans waived quarterback David Carr, the first draft pick in franchise history five years ago. (AP Photo/David J. Phillip)

Carolina Panthers' David Carr (8) throws a pass in an NFL football game in Charlotte, N.C., Sunday, Sept. 30, 2007. (AP Photo/Chuck Burton)

Carolina Panthers quarterback David Carr in action during their football game with the New Orleans Saints in the Superdome in New Orleans Sunday, Oct. 7, 2007. (AP Photo/Ann Heisenfelt)

New York Giants quarterback David Carr scrambles during the third quarter of an NFL preseason football game against the New England Patriots on Thursday night, Aug. 28, 2008 at Giants Stadium in East Rutherford, N.J. The Giants won 19-14. (AP Photo/Bill Kostroun)

New York Giants quarterback David Carr(8) calls out a play during their preseason NFL football game against the Carolina Panthers at Giants Stadium in East Rutherford, N.J., Monday, Aug. 17, 2009. (AP Photo/Kathy Willens)

Houston Texans quarterback David Carr throws a pass during the Texans 34-17 loss to the New York Giants in the Hall of Fame preseason game played on August 5, 2002 at Fawcett Stadium in Canton, Ohio. This preseason game marked the first ever game for the NFL Preseason - Houston Texans vs New York Giants - August 5, 2002 (AP Photo/NFL Photos)

San Francisco 49ers' quarterback David Carr celebrates a touchdown after Anthony Dixon scored during the fourth quarter of a preseason NFL football game against the Oakland Raiders Saturday, Aug. 28, 2010, in Oakland, Calif. (AP Photo/Ben Margot)

New York Giants quarterback David Carr (8) gives his team instructions at the line of scrimmage in front of New England Patriots linebacker Christian Cox (47) during the second quarter of a preseason NFL football game in Foxborough, Mass., Thursday, Sept. 1, 2011.(AP Photo/Michael Dwyer)

New York Giants quarterback David Carr (8) passes the football during an NFL football game against the Oakland Raiders, Sunday, October 11, 2009 at The Meadowlands, East Rutherford, New Jersey. The Giants beat the Raiders 44-7. (AP Photo/David Drapkin)

San Francisco's David Carr throws a pass during an NFL football game against the Carolina Panthers in Charlotte, N.C., Sunday, Oct. 24, 2010. (AP Photo/Rusty Burroughs)

New York Giants head coach Tom Coughlin reacts with quarterback David Carr (8) at the end of the NFL Super Bowl XLVI football game against the New England Patriots, Sunday, Feb. 5, 2012, in Indianapolis. The Giants won 21-17. (AP Photo/David J. Phillip)