With just five carries for seven yards on his 10 plays as a member of the San Francisco 49ers, veteran running back Brandon Jacobs says he is " rotting away " with the team. Jacobs will not have an opportunity to build upon those numbers as he will be inactive for the 10th time this season, which means he will have missed out on $125,000 in "per game active" roster bonuses. Also inactive for the 49ers is wide receiver Mario Manningham, Jacobs' former teammate with the New York Giants, who had been "doubtful" with a shoulder injury. Manningham is second on the 49ers with 41 receptions, adding 449 yards and a touchdown. Being inactive on Sunday costs Manningham a $15,625 roster bonus, the second one he's missed on the season. [More NFL: Cowboys arrest, death serve as sad reminder DUI is major problem for NFL ] Miami Dolphins at San Francisco 49ers Miami : QB Pat Devlin, TE Kyle Miller, TE Michael Egnew, OT Patrick Brown, LB Josh Kaddu, CB Michael Coe, CB/S Jimmy Wilson San Francisco : QB Scott Tolzien, RB Brandon Jacobs, RB Jewel Hampton, WR Mario Manningham, G Joe Looney, NT Ian Williams, S Trenton Robinson New Orleans Saints at New York Giants New Orleans : RB Chris Ivory, TE...