Carroll said after Thursday's practice that it was apparent Pitts, who experienced soreness in his surgically repaired right knee following Wednesday's session, wouldn't be ready this week, leaving the Seahawks short on the offensive line if a move wasn't made. Carroll said the team hoped to bring back the ninth-year NFL veteran when he's healthier.
"In the situation we're in, we had to make a spot for a guy on the roster," Carroll said. "We're hoping Chester will get well. He's just got to get over the hump. He's close, but he's not able to go yet. ... We're hoping he'll get back here quickly."
Pitts, a left guard, was attempting to work his way back from microfracture surgery he had on his right knee early last season while he played for the Houston Texans.
"He's been a diligent worker to get right, and it just hasn't been enough time for him yet," Carroll said of Pitts.
Pitts missed the final 14 weeks last season after the surgery.
Adding to Carroll's problems on the line, starting right guard Sean Locklear didn't participate in practice Thursday with an undisclosed knee injury. Locklear was limited Wednesday.
The Associated Press contributed to this report.