Word that Manziel would be active was first reported on Cleveland.com.
Manziel served as the Browns' third-string quarterback behind starter Josh McCown and backup Austin Davis. Manziel lost the starting job and was made No. 3 after he lied to coach Mike Pettine about a video of him partying in Austin, Texas, during the team's bye week.
Davis replaced McCown in the fourth quarter Monday, after the starter left the game with an apparent right shoulder injury. McCown was 21-of-38 for 212 yards and a touchdown.
Davis was 7-of-10 for 77 yards and added a touchdown as well. His effort to orchestrate a game-winning drive fell short as the Ravens ran back a blocked field goal as time expired for a 33-27 Baltimore victory.
The team has usually kept just two quarterbacks active, except for games in which McCown was fighting through an injury. Davis was active for only two of eight games prior to McCown's injuring his ribs. With Manziel's demotion, it was expected he would be inactive.
McCown played for the first time since a loss to Arizona on Nov. 1.