Buffalo Bills quarterback Josh Allen (17) works against the Carolina Panthers during the first half an NFL preseason football game, Friday, Aug. 16, 2019, in Charlotte, N.C. (AP Photo/Brian Blanco)

Cleveland Browns quarterback Baker Mayfield (6) throws in front of quarterback David Blough (9) during practice at the NFL team's football training camp in Westfield, Ind., Thursday, Aug. 15, 2019. The Browns held a joint practice with the Indianapolis Colts. (AP Photo/Michael Conroy)