Seattle Seahawks running back C.J. Prosise (shoulder) is considered doubtful to play against the Atlanta Falcons, sources tell ESPN's Adam Caplan.

Prosise has been sidelined since injuring his left shoulder in Week 11. The rookie carried the ball 30 times for 172 yards (5.73 YPC) in six regular-season games and caught 17 passes for 208 yards.

Prosise was a full participant in Thursday's practice, an upgrade from Wednesday when he was limited.

Running back C.J. Prosise injured his left shoulder in Week 11, and a return against the Atlanta Falcons seems doubtful. Kirby Lee/USA TODAY Sports

On Thursday, coach Pete Carroll said the team has yet to make a final decision on whether Prosise will play Saturday in the NFC divisional playoff game.

"He made it through practice all this week," Carroll said. "We'll just take it day to day and take it to the stadium and see how it goes.

"He's regaining his confidence to get going again. It's been awhile, seven weeks or something like that. He took a lot of turns yesterday and again today. So he's just getting back. Not sure how we're going to do that. But we'll check him after the whole week's work on Friday and see how it goes and then all the way to gameday."

If Prosise is inactive, the Seahawks will continue to lean on Thomas Rawls, Alex Collins and J.D. McKissic.

Per Caplan, the team is hopeful that Prosise would be able to play in the NFC title game if the Seahawks were to win Saturday.