CINCINNATI -- Cincinnati Bengals defensive end Michael Johnson missed much of Friday's final walkthrough as his teammates prepared for Sunday afternoon's game against New England, but coach Marvin Lewis is still expressing optimism that the fifth-year lineman will play.
Johnson has missed all of this week's practices because of a concussion he received in last Sunday's 17-6 loss at Cleveland. After the game, he informed trainers that he thought he picked one up during the contest and needed to be evaluated. Their tests determined he was right.
"We'll see," Lewis said about Johnson on Friday. "Michael's feeling good. He was able to get back and get some activity. We'll see what happens."
The activity Johnson went through was limited to conditioning work. Until Johnson is cleared to suit up and play, he has to go through a battery of tests and evaluations that are part of what's called the "concussion protocol."
"The protocol is just a process," Lewis said. "So we've got to go through the protocol."
At this point, Johnson could be a game-time decision. If he doesn't play, he'll see an end to his 71-game streak that is tied with punter Kevin Huber for the longest one on the team.
Cincinnati listed Johnson as questionable in its Friday injury report.
Here is Cincinnati's full injury report:
Doubtful: CB Brandon Ghee (thigh), CB Leon Hall (hamstring), G Mike Pollak (knee)
Questionable: CB Dre Kirkpatrick (hamstring), DE Michael Johnson (concussion)