U.S. Army Chief of Staff Ray Odierno speaks with NFL Commissioner Roger Goodell and Lt. Gen. David H. Huntoon Jr. prior to the signing a letter formalizing the initiative between the Army and the NFL to help raise awareness about traumatic brain injury. (Tommy Gilligan/USMA PAO)

Matt Lauer speaks to NFL Commissioner Roger Goodell, U.S. Army Chief of Staff Gen. Raymond T. Odierno and Story Landis, Ph.D, director of the National Institutes of Health's Neurology Institute, at the Today Show studios in New York, New York Sept. 5, 2012. The NFL announced during the Today Show they will donate $30 million for concussion and traumatic brain injury research. Last week the Army and the NFL announced a long-term initiative to inform and educate our Soldiers and Players about traumatic brain injuries. (U.S. Army Photo by Staff Sgt. Teddy Wade)

Matt Lauer, left, speaks to NFL Commissioner Roger Goodell, U.S. Army Chief of Staff Gen. Raymond T. Odierno and Story Landis, Ph.D, director of the National Institutes of Health's Neurology Institute, at the Today Show studios in New York, New York Sept. 5, 2012. The NFL announced during the Today Show they will donate $30 million for concussion and traumatic brain injury research. Last week the Army and the NFL announced a long-term initiative to inform and educate our Soldiers and Players about traumatic brain injuries. (U.S. Army Photo by Staff Sgt. Teddy Wade)

Army Chief of Staff Gen. Ray Odierno speaks about the initiative between the Army and the NFL to help raise awareness about traumatic brain injury. The meeting took place at the United States Military Academy at West Point on August 30, 2012. The Army and the NFL both launched websites in support of this initiative. (Tommy Gilligan/USMA PAO)

Army Chief of Staff Gen. Ray Odierno and NFL commissioner Roger Goodell sign a letter formalizing the initiative between the Army and the NFL to help raise awareness about traumatic brain injury. The meeting took place at the United States Military Academy at West Point on August 30, 2012. The Army and the NFL both launched websites in support of this initiative. (Tommy Gilligan/USMA PAO)

Army Chief of Staff Gen. Ray Odierno and NFL commissioner Roger Goodell sign a letter formalizing the initiative between the Army and the NFL to help raise awareness about traumatic brain injury. The meeting took place at the United States Military Academy at West Point on August 30, 2012. The Army and the NFL both launched websites in support of this initiative. (Tommy Gilligan/USMA PAO)

NFL Commissioner Roger Goodell speaks about the initiative between the Army and the NFL to help raise awareness about traumatic brain injury. The meeting took place at the United States Military Academy at West Point on August 30, 2012. The Army and the NFL both launched websites in support of this initiative. (Tommy Gilligan/USMA PAO)

Army Chief of Staff Gen. Ray Odierno, NFL Commissioner Roger Goodell, and Lt. Gen. David H. Huntoon Jr. meet at the United States Military Academy at West Point on August 30, 2012. (Tommy Gilligan/USMA PAO)

Army Chief of Staff Gen. Ray Odierno and NFL commissioner Roger Goodell tour the cadet mess hall at West Point Military Academy in New York on August 30, 2012. (Photo by Tommy Gilligan/USMA PAO)

NFL commissioner Roger Goodell tours the cadet mess hall at West Point Military Academy in New York on August 30, 2012. (Photo by Tommy Gilligan/USMA PAO)

Liutenant General David Huntoon, Army Chief of Staff Gen. Ray Odierno and NFL commissioner Roger Goodell tour the cadet mess hall at West Point Military Academy in New York on August 30, 2012. (Photo by Tommy Gilligan/USMA PAO)

Army Chief of Staff Gen. Ray Odierno and NFL commissioner Roger Goodell sign a letter formalizing the initiative between the Army and the NFL to help raise awareness about traumatic brain injury. The meeting took place at the United States Military Academy at West Point on August 30, 2012. (Photo by Tommy Gilligan/USMA PAO)

Army Chief of Staff Gen. Ray Odierno speaks after signing a letter formalizing the initiative between the Army and the NFL to help raise awareness about traumatic brain injury. The meeting took place at the United States Military Academy at West Point on August 30, 2012. (Photo by Tommy Gilligan/USMA PAO)

Army Chief of Staff Gen. Ray Odierno and NFL commissioner Roger Goodell sign a letter formalizing the initiative between the Army and the NFL to help raise awareness about traumatic brain injury. The meeting took place at the United States Military Academy at West Point. The Army and the NFL both launched websites in support of this initiative, www.army.mil/tbi and www.nfl.com/military. (Photo by Tommy Gilligan/USMA PAO)

NFL commissioner Roger Goodell speaks after signing a letter formalizing the initiative between the Army and the NFL to help raise awareness about traumatic brain injury. The meeting took place at the United States Military Academy at West Point on August 30, 2012. (Photo by Tommy Gilligan/USMA PAO)

A giant banner of former Arizona Cardinal's Pat Tillman is unfurled by fans during halftime of the New England Patriots/Arizona Cardinals game Sunday, Sept. 19, 2004 at Sun Devil Stadium in Tempe, Ariz. Tillman, who left the Cardinals to become an Army Ranger, was killed in Afghanistan earlier this year.(AP Photo/Matt York)

(L-R) NFL coaches Leslie Frazier, Bill Cowher, Ben Kotwica and Eric Mangini listen in as Major General Mayville (R-Center), thanks them for taking the time to visit with deployed troops, July 2, 2012. (USO/Photo by Dave Gatley)

Members of the United States military watch the Philadelphia Eagles during the morning session of NFL football training camp at Lehigh University in Bethlehem, Pa. on Tuesday, Aug. 3, 2010. The team held its annual Military Day with over 300 members of all four branches of the armed forces in attendance. (AP Photo/Rich Schultz)

Former Pittsburgh Steelers head coach and current CBS Sports analyst Bill Cowher; Minnesota Vikings head coach Leslie Frazier; New York Jets assistant special teams coach/U.S. Army veteran Ben Kotwica; and former NFL coach and current ESPN analyst Eric Mangini poses for a photo inside the Pat Tillman Memorial USO center in Afghanistan, which was funded entirely by the NFL. Upon entry into the center is a photo tribute of Tillman, an NFL player/Ranger who was killed in Afghanistan at the age of 27. (USO/Photo by Dave Gatley)

Jacksonville Jaguars fans wave flags and cheer as two military jets perform a fly over during pre-game ceremonies before an NFL football game against the Tennessee Titans in Jacksonville, Fla., Sunday, Sept. 11, 2011.(AP Photo/Stephen Morton)

NEW YORK- APRIL 23 : 2009 Draft event in Radio City Hall, New York City. Do not use without expressed written consent of the National Football League and the photographer. (Photo by David Drapkin/2009)

Sgt. 1st Class Richard Giertz runs out with the Seahawks as part of the Seattle Seahawks NFL salute to service for military veterans on Veterans Day weekend before the Seattle Seahawks and Baltimore Ravens NFL football game, Sunday, Nov. 13, 2011, in Seattle. (AP Photo/Ted S. Warren)