Carroll said the team was awaiting the results of an MRI but that things didn't look good.
"We don't know how extensive it is, but it will be quite a while," Carroll said Monday during his 710 ESPN Seattle radio show. "He had a significant pop and he could feel it. But [Walter] Thurmond stepped up and played really well. We have total confidence in him."
Thurmond started the first two games of the season when Browner was out with a hamstring injury. Thurmond is the team's fifth defensive back in nickel coverage. Byron Maxwell comes in at the outside corner spot when the Seahawks use the nickel package.