The San Francisco 49ers defense/special teams unit has a rough assignment in a Week 13 matchup against the Bills in Buffalo. San Francisco's defense is banged up entering Orchard Park with a significant snowstorm expected to stop just after kickoff. Lining up across from the Niners D will be Josh Allen and the NFL's 3rd-highest-scoring offense. Ruled out for Sunday are edge Nick Bosa (hip/oblique), defensive tackle Jordan Elliott (concussion), and nickel corner Deommodore Lenoir (knee). ...