Revis did not practice this week and has been sent home after treatment in the mornings. Revis suffered the head injury during the Jets' 24-17 loss at Houston.
"[Revis feels a] little better each day, but not good enough for physical activity," head coach Todd Bowles said. "The [concussion] protocol is the protocol, but we got to clear him and he's got to feel better. There is always concern when somebody gets a concussion. You just don't know how bad it affects them."
The Jets (5-5) are expecting to have starting center Nick Mangold, who went through a full practice and is listed as probable with a laceration in his right snapping hand.
Defensive end Sheldon Richardson, who missed last Sunday's game with a hamstring injury, also participated in a full practice and is ready to return on Sunday.
"Anytime you lose a guy like that, you lose a one-on-one matchup guy," Bowles said of Revis. "... I like [Williams'] poise. He is very patient out there. The moment is not too big for him, the ball finds him, very instinctive, very smart. [But Williams] and the rest of the defense can probably work on tackling and wrapping up [more]."
"We definitely feel like... every game from here on out is a must-win for us," Williams said. "We need this win very bad. We know we are still in it for the playoff hunt. It is going to start this Sunday. I feel every game from here on out is a must-win."