Aren't you allowed to keep an emergency QB on the roster that doesn't count as one of the 53? If so that opens up one spot. We also probably only carry 6 LB's.
That opens up 2 spots.
Killer, you're thinking of the game day active roster in regards to the inactive third quarterback.
Teams are allowed to only have 2 active QBs on the game day roster and use the inactive third QB in the event of injuries or a blow out game.
If the inactive third QB enters the game, the other 2 QBs can not return at a later point in the game.
It was done to allow another depth player to dress, which is primarily to help on special teams.
And I wish the team would only keep 6 LBs on the 53 man roster, but they love going long with 7, even when the last guy is often a fringe talent with minimal chance of sticking long term.
I'd much rather use that spot on a CB or S.