Josh McCown suffered a concussion late in the first quarter of the Cleveland Browns' loss to the New York Jets, leaving Johnny Manziel to finish the game.
Manziel committed three turnovers in the second half. Manziel finished the game going 13-for-24 for 182 yards, one touchdown and one interception.
"I think that's a tough spot given our practice rules and how little work that No. 2s actually get (in practice)," Mike Pettine said. "I thought he did some good things."