Receiver Ted Ginn is active for the first time this season, but two other players who were listed as questionable -- Brandon Jacobs and Isaac Sopoaga -- are not. Sopoaga is dealing with knee and ankle injuries. Ricky Jean Francois stands to make his first start of the season at nose tackle. Jacobs returned to practice this week after an Aug. 18 knee injury but is not ready to return to action.
In addition, nose tackle Ian Williams is active for the first time this season and will serve as Jean Francois' backup at nose tackle. Rookie Trenton Robinson is inactive for the first time this season, a signal that the 49ers are more comfortable with Darcel McBath as a backup at safety.
That Ginn is active likely means he will resume return duties despite the solid work Kyle Williams has done in that regard. Williams has been sure-handed on punt returns, and he returned two kickoffs for 144 yards last week in Minneapolis. Still, Jim Harbaugh was characteristically mum about his return-man plans on Friday. "That's something that we'll assess, and we won't reveal that until is actually happens," he said.
The other 49ers inactives: Scott Tolzien, A.J. Jenkins, LaMichael James and Joe Looney. That means that the only rookie who is active today is undrafted tight end Garrett Celek.
Inactives for the Jets: QB Greg McElroy, RB Jonathan Grimes, CB Darrelle Revis, DT Damon Harrison, OL Caleb Schlauderaff, TE Dustin Keller, WR Stephen Hill.
One-time Raiders wideout Chaz Schilens will start for Hill, one of the receivers who visited the 49ers prior to this year's draft. At tight end, Jeff Cumberland will start for Keller. Look for ex-49er Konrad Reuland to see plenty of action, too.
-- Matt Barrows