LAKE FOREST, Ill. -- The Chicago Bears wrapped up preparation Saturday for their Monday night matchup with the San Francisco 49ers, and coach Lovie Smith declared quarterback Jay Cutler out along with defensive end Shea McClellin and defensive tackle Matt Toeaina.

Cutler and McClellin suffered concussions Sunday against the Houston Texans, while Toeaina has been hampered by a sore calf.

“We have everybody else available,” Smith said. “Besides (Cutler, McClellin and Toeaina) we’re in great shape.”

The team declared Cutler and McClellin out on Friday, but added Toeaina to the injury list a day later.

Jason Campbell will fill in for Cutler at quarterback, with Josh McCown serving as the backup.

“Every rep you get matters,” Smith said of Campbell. “For a quarterback to have all week to know that you’re going to play and get every rep, really get yourself in the mindset that you’re going to play the entire football game, that definitely helps a lot.”

With McClellin out of action along with Toeaina, the Bears will dress seven defensive linemen for Monday’s game, and it’s likely the team will activate defensive tackle Amobi Okoye, who has been inactive for each of the last three games. Corey Wootton will likely see increased repetitions in the defensive line rotation.

“We feel comfortable really playing most of (the defensive linemen on the roster),” Smith said.

In other injury news, rookie receiver Alshon Jeffery appears set to join the Bears for the first time since fracturing a bone in his right hand on Oct. 7 at Jacksonville. Jeffery worked in a limited capacity on Thursday before fully participating in the last two sessions of the week.

Prior to missing time with the injury, Jeffery caught 14 passes for 184 yards and two touchdowns through the first five games