FILE - In this Saturday, Sept. 7, 2019 file photo, Oklahoma quarterback Spencer Rattler (7) carries in the fourth quarter of an NCAA college football game against South Dakota, in Norman, Okla. Rattler is competing with Tanner Mordecai for the starting spot. (AP Photo/Sue Ogrocki, File)

FILE - In this Saturday, Sept. 7, 2019 file photo, Oklahoma quarterback Tanner Mordecai (15) throws in the fourth quarter of an NCAA college football game against South Dakota, in Norman, Okla. Mordecai is competing with Spencer Rattler for the starting spot. (AP Photo/Sue Ogrocki, File)

FILE - In this Saturday, Nov. 9, 2019 file photo, Oklahoma head coach Lincoln Riley talks with players during an NCAA college football game between Iowa State and Oklahoma in Norman, Okla. As usual, Riley is taking his time naming a starting quarterback. (AP Photo/Sue Ogrocki, File)