Bleacher Report has a free agent in mind that could give the 49ers a boost to their backfield as they try to get McCaffrey and Mason healthy for a postseason run. B/R floated the idea of the 49ers reuniting with Jerick McKinnon:

This seems like good news. Jordan Mason was on the field with his teammates wearing a blue non-contact jersey during Monday's practice. This means Mason can run

Mason has 10 days to prepare for the 49ers' Week 7 matchup against the undefeated Kansas City Chiefs. If Mason isn't able to suit up, the 49ers will rely on rookie running back Isaac Guerendo and fourth-year running back Patrick Taylor Jr.