Darrelle Revis is a step closer to getting back on the field for the New York Jets.

The star cornerback, who suffered what the team called a "mild concussion" in last Sunday's victory over the Buffalo Bills, was cleared Wednesday to resume physical activity — running and lifting weights — but he's still not allowed to participate in contact drills.

"As the week goes on, we hope he can progress further and do more things," coach Rex Ryan said. "But obviously, we will follow NFL protocol and lean on the trainers and doctors."

Revis did not practice Wednesday, but it's an encouraging sign that the All-Pro cornerback is resuming normal activities. Revis must be cleared by the team physician and an independent neurological consultant, per NFL protocol, to practice and play at Pittsburgh on Sunday.

The hope is that Revis will be able to practice on a limited basis Thursday and then put in a full session Friday.

Revis was injured when he dived to tackle C.J. Spiller and was accidentally kicked in the head by teammate Bart Scott.

If Revis can't play on Sunday against the Steelers, nickelback Kyle Wilson would start in his place. Each had an interception in the Jets' 48-28 rout of the Bills.

Wide receiver Jeremy Kerley also did not practice after waking up with a stiff lower back.

"I asked him if he came down with the Pittsburgh flu," Ryan joked. "I've seen it happen. They're a very physical football team."

Kerley was selected as the AFC special teams player of the week after returning a punt 68 yards for a score. He also caught a 12-yard touchdown pass, becoming the first player since St. Louis' Az-Zahir Hakim in 2000 to score on a catch and a punt return in a season opener.

Kerley is expected to play Sunday, but Wilson would step in for him as the punt returner if he can't. Clyde Gates, signed off waivers from Miami last week, could be active and serve in Kerley's role as the slot receiver.