ESPN and the NFL Network first reported that the NFL Player's Association (NFLPA) has fired the doctor, an unaffiliated neurotrauma consultant, after they were found to have made "several mistakes ...

The NFL, in collaboration with the NFLPA, through their respective appointed biomechanical experts, coordinated extensive laboratory research to evaluate which helmets best reduce head impact ...

The NFL and NFLPA addressed concerns over the handling ... to put Allen into the concussion protocol and he was checked by doctors on the sideline. Allen was ultimately cleared to return to ...