The second-year pro from Boise State did not practice Friday and is listed as doubtful for Sunday's game against the Lions after injuring his hamstring in Thursday's workout.
"On a personal level, I feel bad for him if he doesn't play because he really had a good game last week, we all know that, and he was moving in the right direction," coach Marc Trestman said Friday after practice. "So certainly I'm disappointed for him."
If McClellin is unable to play, rookie David Bass likely would start opposite
"[Bass] has athletic ability, he's strong up front, he can move around and Mike [Phair] is working hard to continue to develop him," Trestman said. "We think he's got some upside and he's certainly going to get an opportunity to play if this thing goes as we think it will."
Cutler's ready: The injury news was much better for quarterback
"Jay did the entire practice today, had a very good practice, and he looks like he's good to go," Trestman said.
Cutler, who is officially listed as probable, took all of the first-team reps in practice Thursday and Friday. The Bears did not work out Wednesday because they played Monday night.
"Jay took them all this week," Trestman said. "That's how we've operated and that's what we did this week. With only two days, Jay needed every rep anyway, and we had to make sure that what we were seeing in his workouts was the same that we saw in a competitive practice, and they were."
Injury update: Linebacker
For the Lions, receiver Nate Burleson (forearm) is out; and defensive end Ezekiel Ansah (ankle), cornerback Bill Bentley (knee) and tackle Corey Hilliard (knee) are doubtful.
Homeward bound: The Bears will play their first home game Sunday in exactly a month. They're 3-1 this season at Soldier Field, beating the Bengals, Vikings and Giants and losing to the Saints.
"Our guys are really excited to get back to Soldier Field," Trestman said. "It's been a long time, and getting back to our home crowd, we need our fans. They're a big part of what we do. We were up in Detroit and their fans did a great job for them, so we need everybody behind us. I know we'll have that, and like I said, the guys are excited to be home."