Cleveland Browns quarterback Jake Delhomme is not practicing again because of an ankle injury that kept him out of Sunday's home opener.

Delhomme injured his ankle in Cleveland's Week 1 loss to Tampa Bay. He did not practice last week and was inactive Sunday when the Browns lost 16-14 to Kansas City. Seneca Wallace started and may have to again this week at Baltimore if Delhomme can't go.

Coach Eric Mangini would not rate the chances of Delhomme playing against the Ravens and their fearsome defense. Mangini said Delhomme has been improving and remains optimistic the 35-year-old will be able to play.

"He's further along than last week," Mangini said before practice Wednesday. "He's doing everything he can. I feel comfortable with him taking the information and (playing) without reps."

Wallace, who dropped to 5-10 in 15 career starts, was the 15th different quarterback to start for the Browns since 1999. Rookie Colt McCoy was Wallace's backup Sunday.

Mangini also said tight end Evan Moore sustained a concussion against the Chiefs. Nose tackle Shaun Rogers (ankle), guard Shawn Lauvao (ankle) and defensive end Robaire Smith (ankle) are also sitting out practice.