When the Bears had a quarterback issue, they turned to Nick Foles.
When wide receiver Anthony Miller’s production dipped, they turned to rookie Darnell Mooney.
With rookie tight end Cole Kmet still getting acclimated to the offense, they turned to Demetrious Harris.
But an underperforming offensive line is much more problematic. A team-within-a-team, the issues are often hard to define. They take turns contributing to the problem — Bobby Massie gets beat on one play, Cody Whitehair the next and Charles Leno the one after that.
And you usually can’t just plug one new guy in and fix it.