WASHINGTON - OCTOBER 28: National Football League Commissioner Roger Goodell (L) testifies with others before the House Judiciary Committee about football brain injuries on Captiol Hill October 28, 2009 in Washington...

...conference at the Switzer Center. Bradford skipped last year's NFL draft to continue his collegiate career but suffered a season ending shoulder injury against Texas

...Philadelphia Eagles during an NFL football game in Charlotte, N.C., Sunday, Sept. 13, 2009. From Delhomme's 11 turnovers in two games to backup Josh Mc Cown's leg injuries, the Panthers are in...

...in drills during an NFL football training session on Sunday, Aug. 16, 2009, in Englewood, Colo. Marshall has been sidelined the past two weeks to take care of a leg injury and be at his...

...Bengals training room, Monday, Sept. 10, 2007, in Cincinnati, urges NFL football players to keep their heads up when they tackle to help prevent injuries. (AP Photo/Al Behrman

...28, 2009 file photo showing NFL Commissioner Roger Goodell testifying on Capitol Hill in Washington, before the House Judiciary Committee hearing on legal issues relating to football head injuries. Goodell plans to ask Congress...

...Chargers linebacker Tim Dobbins is wheeled off the field after suffering a knee injury in the second quarter of the Chargers' NFL football game against the Oakland Raiders Sunday, Nov. 1, 2009 in San Diego...

...Jake Delhomme, left, comes off the field after an injury as teammate A.J. Feeley sees how Delhomme is in the second half of an NFL football game against the Arizona Cardinals, Sunday, Nov. 1...

...Smith, center, and NFL Commissioner Roger Goodell, testifies on Capitol Hill in Washington, Wednesday, Oct. 28, 2009, before the House Judiciary Committee hearing on legal issues relating to football head injuries. (AP Photo/Charles...

...at right as NFL Commissioner Roger Goodell testifies on Capitol Hill in Washington, Wednesday, Oct. 28, 2009, before the House Judiciary Committee hearing on legal issues relating to football head injuries. (AP Photo/Charles...

...left, talks with NFL Commissioner Roger Goodell on Capitol Hill in Washington Wednesday, Oct. 28, 2009, after his testimony before the committee's hearing on legal issues relating to football head injuries. (AP Photo/Charles...

...and NFL Commissioner Roger Goodell, sit at the witness table on Capitol Hill in Washington, Wednesday, Oct. 28, 2009, during a House Judiciary Committee hearing on legal issues relating to football head injuries. (AP...

...Oct. 28, 2009, before a House Judiciary Committee hearing on legal issues relating to football head injuries. NFL Commissioner Roger Goodell, left, and NFL Players Association Executive Director DeMaurice Smith, center, look on. (AP...

...NFL Commissioner Roger Goodell sit at the witness table on Capitol Hill in Washington, Wednesday, Oct. 28, 2009, prior to testifying before a House Judiciary Committee hearing on legal issues relating to football head injuries...

...talks with NFL Commissioner Roger Goodell on Capitol Hill in Washington, Wednesday, Oct. 28, 2009, during a break in the House Judiciary Committee hearing on legal issues relating to football head injuries. (AP Photo...