-- The NFL Players Association opposes commissioner Roger Goodell's call for players to tell their teams' medical staffs if they think a teammate shows symptoms of a concussion.

NFLPA assistant executive director George Atallah tells The Associated Press on Friday that Goodell's suggestion is not an adequate solution.

Atallah says that instead of wanting players "to police each other," the league should make sure doctors keep a closer eye on players.

During interviews of 160 NFL players conducted by The Associated Press from Nov. 2-15, 30 replied they have hidden or played down the effects of a concussion. Half said they've had a concussion playing football.

Goodell said players should observe teammates and report if there are signs of a head injury.