Sunday Night Football week XIII consists of a fully battle tested & fully rested Buffalo Bills team hosting an extremely desperate and beat up San Francisco 49ers teams. Brandon Allen for the 49ers will most likely get the start is Brock Purdy isn't ready. Josh Allen is primed and ready to prove something against a 49ers team he last beat in 2020 (34-24) in Santa Clara on MNF. This meeting has a 49ers team is coming off a week XII loss and Buffalo defeated Kansas City before their recent week XII BYE.