The U.S. Supreme Court let stand the National Football League’s $765 million concussion settlement, turning away contentions by former players that the accord won’t adequately compensate them for the brain damage they may have suffered. The justices, without comment, left intact a federal appeals court ruling that the agreement, while imperfect, was a fair resolution of claims filed on behalf of more than 20,000 retired NFL players. Monday’s rebuff clears the way for players and families to start receiving payouts early next year.