The answer, of course, is Lance Briggs.
The Bears Pro Bowl weakside linebacker did not play in that game, with an ankle injury.
Briggs was diplomatic today, when asked about his potential impact.
"Not really," Briggs said, when asked if he would have made a difference in that game, which the Bears lost 23-20 at Soldier Field. "Not the way the way that game turned out. Obviously, I wanted to play in that game, but Brian Iwuh played great. He did a great job that game, and in the [Washington] Redskins game.
"So, for me, it's wanting to get a first crack at them."
But several of Briggs' teammates disagreed.
"It'll be big to get him back," defensive end Julius Peppers said. "This defense, we all work together. It's not a one-person show. We all have to play our role. But missing Lance was big for us. Having him back in there will settle rotation, and it's going to be huge for us."