FILE - In this Aug. 21, 2020, file photo, Houston Texans coach Bill O'Brien watches during an NFL football training camp in Houston. Alabama has hired former Texans coach O'Brien as offensive coordinator and quarterbacks coach. Crimson Tide coach Nick Saban announced the hiring on Thursday, Jan. 21, 2021. O'Brien is replacing Steve Sarkisian, who left to become head coach of the Texas Longhorns after the national championship game. (AP Photo/David J. Phillip, File)

FILE - In this Nov. 9, 2019, file photo, Alabama offensive coordinator Steve Sarkisian watches warm-ups before an NCAA football game against LSU in Tuscaloosa, Ala. Sarkisian made the most of his final game with Alabama and three of the most dangerous weapons in college football during the College Football Playoff national championship game against Ohio State on Monday, Jan. 11, 2021. (AP Photo/Vasha Hunt, File)

Alabama head coach Nick Saban is soaked in a sports drink after their win against Ohio State in an NCAA College Football Playoff national championship game, Monday, Jan. 11, 2021, in Miami Gardens, Fla. Alabama won 52-24. (AP Photo/Wilfredo Lee)