Texas A&M Aggies quarterback Johnny Manziel (2) greets a young fan after defeating the Duke Blue Devils during the 2013 Chick-fil-A Bowl at the Georgia Dome. Texas A&M won 52-48. (Paul Abell-USA TODAY Sports)

Texas A&M Aggies quarterback Johnny Manziel (2) celebrates with wide receiver Mike Evans (13) in the fourth quarter against the Duke Blue Devils in the 2013 Chick-fil-a Bowl at the Georgia Dome. (John David Mercer-USA TODAY Sports)

Texas A&M Aggies quarterback Johnny Manziel (2) reacts to a fourth-quarter interception against the Duke Blue Devils in the 2013 Chick-fil-A Bowl at the Georgia Dome. (Daniel Shirey-USA TODAY Sports)

Texas A&M quarterback Johnny Manziel (2) encourages the crowd during the fourth quarter of an NCAA college football game against Mississippi State Saturday, Nov. 9, 2013, in College Station, Texas. Texas A&M won 51-41. (AP Photo/David J. Phillip)

A fan shows his support for Texas A&M quarterback Johnny Manziel during the second quarter of an NCAA college football game against Mississippi State Saturday, Nov. 9, 2013, in College Station, Texas. (AP Photo/David J. Phillip)

Texas A&M quarterback Johnny Manziel (2) celebrates after eluding Alabama defensive lineman Jeoffrey Pagan (8) to make a pass during the second quarter of an NCAA college football game Saturday, Sept. 14, 2013 in College Station, Texas. (AP Photo/David J. Phillip)

Texas A&M quarterback Johnny Manziel (2) celebrates after throwing to touchdown pass to Ja'Quay Williams (not shown) during the second quarter of an NCAA college football game against Sam Houston State, Saturday, Sept. 7, 2013, in College Station, Texas. (AP Photo/David J. Phillip)

Texas A&M quarterback Johnny Manziel (2) celebrates throwing his first touchdown of the season against during the third quarter at Kyle Field. (Thomas Campbell-USA TODAY Sports)

Texas A&M quarterback Johnny Manziel reacts after scoring a touchdown against Oklahoma in the Cotton Bowl at Cowboys Stadium. Texas A&M won the game, 41-13. (Kevin Jairaj-USA TODAY Sports)

Texas A&M quarterback Johnny Manziel kisses the Heisman Trophy after becoming the first freshman to win the college football award. (AP Photo/Henny Ray Abrams)

Texas A&M quarterback Johnny Manziel reacts at the end of a 29-24 win over Alabama at Bryant-Denny Stadium in Tuscaloosa, Ala. (AP Photo/Dave Martin)

Texas A&M quarterback Johnny Manziel reacts after the Aggies scored their third touchdown of the first quarter against Alabama at Bryant-Denny Stadium in Tuscaloosa, Ala. (AP Photo/Dave Martin)

Texas A&M quarterback Johnny Manziel celebrates after scoring a touchdown against Mississippi State at Davis Wade Stadium. (Spruce Derden/US PRESSWIRE)

Texas A&M wide receiver Mike Evans (13) and quarterback Johnny Manziel celebrate a big play against LSU at Kyle Field. (Thomas Campbell/USA Today Sports)

Texas A&M quarterback Johnny Manziel celebrates after scoring the game-winning touchdown during the fourth quarter against Louisiana Tech at Independence Stadium. (Kevin Jairaj-US PRESSWIRE)

Texas A&M quarterback Johnny Manziel (2) sings the "Aggie War Hymn" following a 48-3 win over SMU at Gerald J. Ford Stadium. (Thomas Campbell-US PRESSWIRE)

Texas A&M's Johnny Manziel reacts after a touchdown run against Florida in College Station, Texas. (AP Photo/Dave Einsel)