Peterson cleared the league's concussion protocols Thursday, Darren Urban of the Cardinals' official site reports.

Peterson (head) is being evaluated for a concussion and is questionable to return Sunday against the Seahawks. Darren Urban of the Cardinals' official site reports.

Peterson (undisclosed) was released from injury reserve by the Titans on Tuesday, NFL reporter Aaron Wilson reports.

Peterson was placed on injured reserve for an unspecified reason Monday, Jim Wyatt of the Titans' official site reports.

Peterson signed with the Titans on Thursday.

Peterson (concussion) was activated from the injured reserve list Saturday, Darren Urban of the Cardinals' official site reports.

Peterson (concussion) has been designated for a return from injured reserve by the Cardinals on Wednesday.

The Cardinals placed Peterson on injured reserve Wednesday.

Peterson will not return to Sunday's game against the Dolphins due to a concussion, Darren Urban of the Cardinals' official site reports.

Peterson left Sunday's game against the Dolphins to be evaluated for a concussion, Darren Urban of the Cardinals' official site reports.