New York Jets cornerback Darrelle Revis has been cleared for activity, but cannot yet practice as he goes through the league's protocol in recovering from a mild concussion sustained last Sunday.

The Jets will visit Pittsburgh this Sunday.

Revis was hurt while making a tackle in the fourth quarter of New York's 48-28 win over Buffalo when he was kicked in the head by teammate Bart Scott.

"He's cleared to resume physical activity, but he is out for practice (Wednesday)," said Jets head coach Rex Ryan on Wednesday. "As the week goes on, we hope that he can progress further and do more things, but we will follow the NFL protocol and lean on the trainers and doctors."

Revis had an interception in last Sunday's win.

Ryan also said return specialist Jeremy Kerley would be limited in practice Wednesday after developing a stiff lower back. Kerley returned a punt for a touchdown last Sunday against the Bills.

In addition, Ryan said tight end Dustin Keller is bothered by a hamstring injury, while rookie receiver Stephen Hill has a calf issue and defensive tackle Sione Po'uha has a back problem. All three were listed as limited for practice.