Johnson (concussion) did not participate in Wednesday's practice.
Johnson was forced out of last Thursday's loss to the Lions due to the concussion, and he didn't make enough progress through the five-step protocol to resume on-field work as the Bears kicked off Week 14 prep. With D'Andre Swift (quadricep) also sitting out practice Wednesday, special-teams ace Travis Homer took on extra reps out of the backfield during the session, and he could handle a key role on offense during Sunday's game against the 49ers if neither Swift nor Johnson are available. Darrynton Evans will also be a candidate for elevation from the practice squad to burnish the Bears' depth in the backfield.