What happened: Kaelon Black is expected to play Sunday after being limited some this week by a groin issue. Kyle Shanahan said earlier in the week that the injury was minor.

Why it matters: That keeps a key back available with the game still scheduled and the score still 0-0. It also eases some late-week uncertainty around San Francisco's backfield.

What to watch: Watch the inactive list for Black's official game-day status. His early workload will show how much the limited week mattered.