NEW YORK — The NFL will be hiring a full-time chief medical officer to work with team medical staffs, the players’ union and league committees.

In a letter sent to the 32 team presidents and obtained by The Associated Press on Wednesday, Commissioner Roger Goodell said the chief medical officer also would work with “the broader independent scientific and medical communities.”

The new hire will replace Dr. Elliot Pellman, who is retiring after 30 years in the league, and will have expanded duties.

Pellman mostly played an administrative role that included communication with NFL clubs regarding health and safety protocols. Pellman was not a member of any league medical committee. But much of the early criticism of the NFL regarding its handling of concussions was directed at Pellman, who once famously downplayed links between head trauma and football.

Pellman is a rheumatologist with little expertise in head and brain trauma research, but he was involved in the formulation of the NFL’s concussion policies.

Goodell also told the teams that the NFL must demonstrate strong leadership on health and safety “and that our players and fans need to trust in us.”

“In recognition of this priority (on player health and safety) and the increasing complexity of our work, we intend to hire a highly credentialed physician to serve as Chief Medical Officer and work in the league office on a full-time basis.”