NFL  medical and training staffs already challenged by concussion protocol now can look forward to getting in-game telephone calls from league officials ordering them to evaluate players.

The league observer at games can give the order any time they suspect a concussion or other injury has occured. NFL monitors in New York also can give  the order through the observer.

The change is primarily for improving concussion safety. Teams were notified in  a memo Tuesday.

"The purpose ....is to allow the NFL Observer to alert the Athletic Training staff to a possible injury that may have been missed at field-level," per the report.

The trainers and doctors then must evaluate the player or players brought to their attention.

NFL Players Association medical director Dr. Thom Mayer signed off on the new process effective Thanksgiving Day.