Brandon Jacobs (knee) is inactive for Week 4 against the Jets. Ted Ginn (knee) is active and figures to immediately re-assume return duties, but the 49ers don't have their short-yardage specialist back. Frank Gore will continue to handle goal-line work. Also inactive for San Francisco: NT Isaac Sopoaga, QB Scott Tolzien, WR A.J. Jenkins, RB LaMichael James, OG Josh Looney, and TE/FB Gijon Robinson. Jacobs may return in Week 5.