To make matters worse, offensive lineman Spencer Burford, who was supposed to start at left tackle with Williams and his backup Jaylon Moore on IR for the season, is listed as ‘out’ on the injury report with a calf injury he sustained in the team’s Week 16 loss to the Miami Dolphins.

The San Francisco 49ers’ practice schedule began a day later than normal with a Monday night showdown against the Detroit Lions coming up in Week 17. Their practice report opened with some good news on the injury front. Running back Isaac Guerendo returned as a limited participant after missing all of Week 16 with a hamstring injury.