Texas A&M quarterback Johnny Manziel kisses the Heisman Trophy after becoming the first freshman to win the college football award, Saturday, Dec. 8, 2012, in New York. (AP Photo/Henny Ray Abrams)

Texas A&M quarterback Johnny Manziel (2) runs between Oklahoma's Chuka Ndulue (98) and R.J. Washington during the second half of the Cotton Bowl NCAA college football game Friday, Jan. 4, 2013, in Arlington, Texas. (AP Photo/Tony Gutierrez)

FILE - In this Nov. 17, 2012, file photo, Texas A&M's Johnny Manziel rolls out to throw a touchdown pass during the first quarter of an NCAA college football game against Sam Houston State in College Station, Texas. Manziel has become the first freshman to be voted The Associated Press Player of the Year in college football, Tuesday, Dec. 18, 2012. (AP Photo/Dave Einsel, File)

Texas A&M quarterback Johnny Manziel (2) warms up before an NCAA college football game against LSU in Baton Rouge, La., Saturday, Nov. 23, 2013. (AP Photo/Gerald Herbert)