Devlin will provide depth at quarterback while backup Johnny Manziel rests his sore right elbow.
On Wednesday afternoon, coach Mike Pettine said Manziel will likely sit out the third preseason game Saturday night at Tampa Bay, leaving projected starter Josh McCown and third-stringer Thad Lewis to handle the quarterback duties against the Buccaneers.
Pettine said the Browns probably wouldn't summon a new quarterback for action in Tampa if they were to sign one this week, but he would be more likely to play in the exhibition finale Sept. 3 at Chicago. In other words, Devlin probably won't play until the last preseason game against the Bears.