When the Chargers (9-7) and Raiders (9-7) hook up for the final game of the 2021 NFL regular season on "Sunday Night Football" (8:20 p.m. ET, NBC), they will be playing Gale Sayers Jersey what feels like a playoff game. Barring a tie, only one of the two teams can make the AFC playoffs as a wild-card team behind the West-winning Chiefs.The Chargers are coming off a rebound home win over the...