NFL owners have approved a bylaw that will allow teams to have a third active quarterback for game days that will not count against their available roster spots, as confirmed by CBS Sports NFL Insider Jonathan Jones.
According to the new bylaws, teams may designate an emergency quarterback who can be activated in the event that the team’s first two quarterbacks are either injured or disqualified. The emergency quarterback must exit the game If the medical staff clears either of the injured quarterbacks to return to action. The emergency quarterback would again be eligible to play in the event of another emergency.
Furthermore, a team cannot use an emergency quarterback if three quarterbacks are already on the active game day roster.