Niners S Jaquiski Tartt is out for today's game against the Chiefs with a shoulder injury.

Niners S Jaquiski Tartt re-aggravated his shoulder injury in Sunday's loss to the Seahawks. Tartt has already lost 4 games to injury this season and hasn't reached 90% playing time since Oct. 21. He's not worth hanging on to in most IDP leagues at this point. If Tartt misses further time, Antone Exum would hit the IDP radar. He started in Tartt's place earlier this year and stepped in for the other half of Sunday's SS snaps.

The 49ers have ruled out SS Jaquiski Tartt (shoulder) for Thursday night's game against the Raiders. They will also be without his backup, Antone Exum (concussion). That likely means the 1st career start for S Tyvis Powell. San Franscisco also lists CB Richard Sherman (calf, heel) as questionable. An already-weak defense looks even softer for Week 9.

The 49ers expect to get S Jaquiski Tartt back in the lineup for Sunday's game against the Cardinals, according to NBC Bay Area's Matt Maiocco. Tartt missed the past 2 games with a shoulder injury, and Antone Exum delivered a pair of top-3 fantasy finishes among DBs in his place. There's no reason to believe we can't get top-shelf fantasy production from Tartt at the position going forward.

The 49ers will likely miss SS Jaquiski Tartt for the 2nd straight week. He missed every day of practice with the shoulder injury that ended his Week 2 early and cost him Week 3. Antone Exum figures to start in Tartt's place again and looks like a decent IDP option against the Chargers. Exum racked up 9 tackles (8 solo) and a sack against the Chiefs last time out.

Niners S Jaquiski Tartt remained out with a shoulder injury Wednesday when the team started practice for the Week 4 matchup with the Chargers. Tartt missed Week 3 and watched Antone Exum step in for 9 tackles (8 solo) and a sack. If Tartt can't go Sunday, then Exum becomes an IDP option.