Bengals' Jermaine Gresham downgraded

CINCINNATI -- When it comes to the injury front, this week's Cincinnati Bengal to watch is tight end Jermaine Gresham.

One day after participating in a limited capacity in the team's first practice of the week, Gresham was held out of Thursday's workout. A tender groin was the apparent culprit, keeping him out of uniform and relegated to roving the sideline while his teammates went through their second-to-last practice ahead of Sunday's game at Baltimore.

It isn't yet clear when Gresham suffered the injury, but it was at least serious enough to keep him off the field. If he practices Friday, he stands a strong chance to go Sunday.

The Bengals can ill-afford to lose another key player, even if it's for one game. Just last week, defensive tackle Geno Atkins' season came to an end when he suffered a torn ACL. When he was placed on the injured reserve, Atkins became the fourth player the Bengals have lost for the season since Week 1. In all, eight players are on IR dating back to the preseason.

Cincinnati also is missing defensive tackle Devon Still and linebacker Rey Maualuga. Both are expected to return in the next few weeks from elbow and knee issues, respectively. Chances are both will return the week the Bengals make their only West Coast trip of the season, when they head to San Diego on Dec. 1. Before that game, they have this weekend's contest against the Ravens, a home tilt against the Browns and then a bye.

Along with Gresham, Still and Maualuga missed Thursday's practice.

Three other Bengals practiced in a limited capacity, while another worked out in full capacity. Offensive tackle Andrew Whitworth, who was held out of Wednesday's session due to a non-injury-related issue, was completely back. Whitworth likely won't be practicing on Wednesdays the rest of the year as he gets an extra day off to heal and recover each week.

The three limited Bengals were running back Giovani Bernard, linebacker Michael Boley and guard Kevin Zeitler. Earlier in the day, Bernard, who has a bruised rib, said he was feeling better after taking a hard shot late last Thursday night.

"I'm good, so we'll see how it goes with practice here and there," Bernard said.

Here is the Bengals' complete Thursday injury report:

Did not practice

TE Jermaine Gresham (groin)

LB Rey Maualuga (knee)

DT Devon Still (elbow)

Limited participation

RB Giovani Bernard (ribs)

LB Michael Boley (hamstring)

OG Kevin Zeitler (hamstring)