The Seattle Seahawks were down to one healthy tight end after Luke Willson suffered a concussion in Sunday's 23-17 loss to the St. Louis Rams.

Willson was injured in the second quarter when he absorbed a hit from Rams cornerback Trumaine Johnson in the second quarter, leaving Cooper Helfet as the only tight end for the remainder of the game.

Seahawks coach Pete Carroll on Monday told reporters that Willson made "marked improvements" but acknowledged it was too soon to tell if the tight end would be available for Sunday's regular-season finale at the Arizona Cardinals.

More from FoxSports

"He's already making progress, which is a really good sign for somebody that comes back from that," Carroll said. "Often, the guys make no progress in the first two or three days. That's good. We'll see what happens, though. We'll take good care of him."

Chase Coffman, signed twice since Jimmy Graham was lost for the season, is the only other tight end on the roster but he was inactive Sunday. Anthony McCoy was placed on season-ending injured reserve Saturday.

Carroll said offensive tackle Russell Okung, safety Kam Chancellor and defensive tackle Jordan Hill could all return for Sunday's matchup. Chancellor has missed two games with a tailbone injury while Hill (toe) has sat out four straight contests.

MORE NEWS: Want stories delivered to you? Sign up for our NFL newsletters.