BEREA, Ohio -- Johnny Manziel expects to be ready to be the Cleveland Browns' backup quarterback in Sunday's season opener against the New York Jets.

Manziel threw in practice Monday for the first time since Aug. 23. Tendinitis in his right elbow led the Browns to rest him since that day and for the final two preseason games.

Asked if he had any doubt about being ready to go on Sunday, Manziel said: "Not in my mind. Not, I don't think, in anybody else's, either."

Manziel said he started throwing a football the past couple days, and that he threw lightly in Monday's practice. That was by design, he said.

Browns quarterback Johnny Manziel has not thrown with his right arm in practice since Sunday, when he left practice early. AP Photo/Tony Dejak

"It's a Monday, it's kind of the extra practice for us," Manziel said. "So there's no reason to be out there really slinging it around."

He said he fully expects to throw all-out on Wednesday, when the Browns practice next.

"Stay on this pitch count for a couple days and be ready for the time I need to be," Manziel said.

Coach Mike Pettine said Manziel should be ready to go Sunday, "barring a setback."

Manziel said he was not overly concerned about the tendinitis because it was simply a matter of overuse. He said rest reduced the inflammation.

"Now it should be back to normal and everything should be fine," Manziel said. "From now on, learning that, OK, hey, when it gets to this point, let's take it a little bit easier and not get to the point of overuse."

To help at the position, the Browns signed Austin Davis, who started eight games for the St. Louis Rams last season, and placed rookie cornerback Charles Gaines on the short-term injured reserve list -- meaning he'll be eligible to play after Week 8.

Running back Duke Johnson, who was diagnosed with a concussion in the third preseason game, did not practice.