Running back Chris Carson, who was listed as questionable for Thursday night's game against the Rams, is inactive due to the neck injury that kept him out of practice all week.

Carson, who leads the team with 232 rushing yards and three touchdowns on 54 carries, has been dealing with the neck injury off and on for a while, Seahawks coach Pete Carroll said, but it did not keep him out of action in the previous four weeks.

"He has had kind of a long-term condition he has dealt with, and sometimes it flares up and sometimes it doesn't," Carroll said Wednesday. "We've tested him and MRI'd him and all that kind of stuff, it's no different than it's been, it's just obviously inflamed right now, so we've got to see if it quiets down."

Carson being out likely means the start will go to Alex Collins, who provided a spark for the offense off the bench in last week's win over the 49ers, rushing for 44 yard and a touchdown on 10 carries while also adding a 28-yard reception that helped jump-start Seattle's first scoring drive of the game.

Carroll described Collins' impact on last game as being, "really obvious. He had the big catch and run which was easy for him but a nice play, it changed field position and got us moving a bit. His running was really effectively and consistent, then he had the really nice touchdown run where he was dancing through the mess, it looked great. Alex has really been a come through guy for us, he has really done a nice job when we've called on him. He practices really hard, he's tuned in everyday, so he prepares to do well, and it happened. It was great."

Linebacker Benson Mayowa, who was listed as questionable, is active and will be back after missing the previous two games with a neck injury. Also active is right tackle Brandon Shell, who missed the previous two games with an ankle injury.

Defensive end L.J. Collier is active for only the second time this season, having been a healthy scratch in three of four games. With Collier active, defensive tackle Robert Nkemdiche is inactive.

Also active is receiver Phillip Dorsett II, who was elevated from the practice squad, which means he'll make his Seahawks debut more than a year after initially signing with Seattle as a free agent, then missing the entire 2020 season with a foot injury.

The Seahawks will also be without tight end Gerald Everett, who was not activated off of the reserve/COVID-19 list.

Here are Thursday's inactives:

Seattle Seahawks

• CB John Reid
• RB Chris Carson
• T Jake Curhan
• T Stone Forsythe
• DT Robert Nkemdiche

Los Angeles Rams

• QB Bryce Perkins
• OLB Chris Garrett
• OL AJ Jackson
• TE Brycen Hopkins
• DL Bobby Brown III