Dunlap, Harrison, Newman and Whitworth sit during Thursday's practice

Bengals defensive end Carlos Dunlap remains sidelined during practice, suffering a concussion during the final play of the game against the Pittsburgh Steelers. It's the second consecutive practice that he's missed, jeopardizing his opportunity to play this weeekend against the Minnesota Vikings. More concerning is that it's his second concussion in a span of six months.

Linebacker James Harrison also sat on Thursday, similarly dealing with a concussion sustained against the Steelers on Sunday. Harrison and Dunlap were in sweats on the sidelines undergoing concussion protocols. That would suggest that both players are working out, per the protocols, while trainers see if there's any concussion-related symptoms and how that compares to the base-line testing from training camp.

Bengals offensive tackle Andrew Whitworth sat on Thursday, but that's mostly viewed as being a rest day. Cornerback Terence Newman remains sidelines with a sprained MCL and isn't expected to play this weekend against the Vikings. It appears likely that he'll sit for the rest of the regular season to rest up for the playoffs. However, if the Bengals are unable to secure a postseason berth this weekend, we have to believe that Newman might be available during the finale against the Baltimore Ravens.