NFL Offseason - The NFL passed a couple of important rule changes at the owners' meetings today, including the return of the third QB rule and flex scheduling for Thursday nights.
The third quarterback rule is a response to the 49ers running out of quarterbacks in the NFC Championship Game. The emergency quarterback has to be a player on the 53-man roster, not a practice squad player elevated for that week's game. However, the third quarterback becomes an extra active player. He can only come in if the team loses its first two quarterbacks due to injury or disqualification.