Frank Gore RB SF 4 Hrs

Gore (knee) is listed as active for Thursday's game against the Seahawks.

Gore, who was held to 36 yards on 13 carries by Washington in Week 12, will take aim Thursday at a rugged Seattle defense that is allowing an average of 88.4 rushing yards per game to date. Double-digit carries should be on tap for him Thursday, but Gore's production has been sporadic since he recorded back-to-back 100-yard efforts in Weeks 4 and 5.

Brandon Marshall WR CHI 5 Hrs

Marshall (ankle) made six catches among 11 targets on his way to 42 yards in Thursday's loss at Detroit.

Marshall's YPC has decreased in four consecutive games, from 14.0 in Week 10 to 7.0 on Thursday. Week 10 doubles as the game in which he injured his ankle, and while his production didn't fall off in the first two contests -- 15 combined receptions for 202 yards and three touchdowns -- Marshall managed just nine catches for 72 yards without passing the goal line over the past two tilts. No matter, the veteran wideout has displayed an ability to bounce back, which he'll attempt to accomplish next Thursday against a Cowboys defense that had yielded 13.0 YPC and seven touchdowns to wide receivers entering Week 13.

Martellus Bennett TE CHI 5 Hrs

Bennett hauled in eight of 11 passes for a team-high 109 yards during Thursday's defeat in Detroit.

Although Bennett has failed to reach the end zone in eight of the last nine contests, he matched a season high in targets, while reaching the century mark in receiving yards for the second time this season. Keep in mind, though, that much of his production occurred in garbage time, as he recorded five catches for 74 yards in the fourth quarter. Such output, non-PPR, surpasses Bennett's output from nine of 12 complete games this season, but with 7.8 targets per game on the ledger, he remains a must start from week-to-week.

Latavius Murray RB OAK 5 Hrs

Murray (concussion) remained limited at practice on Thursday, the San Francisco Chronicle reports.

As the final practice of the week approaches, Murray has yet to pass all of his concussion tests, and thus remains questionable for Sunday's game against the Rams. "He still has one step to go, we're not there yet," coach Tony Sparano said Thursday. An expanded role presumably awaits Murray the next time he plays, but his Week 13 status hinges on Friday's developments, before and after practice.

Aqib Talib DB DEN 6 Hrs

Talib (hamstring) did not practice Thursday, reports.

We'll revist Talib's status Friday, but back-to-back missed practices cloud his Week 13 status at this stage.

Julius Thomas TE DEN 6 Hrs

Thomas (left ankle sprain) practice on a limited basis Thursday, reports.

The report notes that Thomas received treatment following the Broncos' practice, with the tight end's status for Sunday night's game against the Chiefs still unclear. When asked Thursday about the Week 13 status of Thomas and linebacker Brandon Marshall, coach John Fox replied, "I don't like trying to predict the future, we'll see where they are (Friday)."

Alshon Jeffery WR CHI 6 Hrs

Jeffery gathered in nine of 13 passes for 71 yards and two touchdowns during Thursday's defeat at Detroit.

Jeffery was the beneficiary of the Bears' quick strike offense in the first quarter, notching four catches for 24 yards and two touchdowns en route to a 14-3 lead. During the final three quarters, Detroit's defense stiffened when it was required, yet Jeffery still contributed two lengthy receptions to pad his performance. With five scores in the last five games, he's no doubt on pace to finish this season as he did in 2013.

Michael Griffin DB TEN 6 Hrs

Griffin (shoulder) did not practice Thursday, the Tennessean reports.

We'll check back on Griffin's status Friday, but in the event that he isn't able to play Sunday against the Texans, the report relays that coach Ken Whisenhunt indicated that the likes of Marqueston Huff and Brandon Ghee could see added snaps at safety this weekend.

Derek Carrier TE SF 6 Hrs

Carrier (foot) has been placed on injured reserve, the Sacramento Bee reports.

With Carrier on IR, the 49ers added TE depth Thursday by activating Garrett Celek from the PUP list and promoting Asante Cleveland from their practice squad.

Garrett Celek TE SF 6 Hrs

The 49ers have activated Celek (back) from the PUP list, the Sacramento Bee reports.

Celek, who earns his keep as a blocking tight end, will bolster the 49ers' depth behind Vernon Davis, with Derek Carrier on IR and Vance McDonald banged up.