SANTA CLARA, Calif. -- The San Francisco 49ers -- after losing back-to-back games by a total of four points -- are suddenly a long shot to make the playoffs.Stunning, right?Two weeks ago, the 49ers were coming off the bye at 6-2 on the strength of a five-game winning streak. Now, they are 6-4, and mathematically speaking, on the outside of the playoff chase.According to NumberFire, the 49ers have a 35.7 percent chance of making the playoffs as a wild-card entry with six weeks left.