FILE - In this Nov. 11, 2017, file photo, Oklahoma head coach Lincoln Riley, right, talks with quarterback Baker Mayfield (6) in the first quarter of an NCAA college football game against TCU, in Norman, Okla. The Browns rookie quarterback Baker Mayfield believes Riley is ready to make the jump to the NFL. Mayfield played for Riley in college and has a strong relationship with his former coach. (AP Photo/Sue Ogrocki, File)