There are 3 quarterbacks
Click on the 'Black Quarterbacks - 2007' link on this page to see African American quarterbacks that are on rosters.
the vikings and the the raiders
There is at least one quarterback for each NFL team. Each time probably has one or two second line quarterbacks that can be used in case of injury.
None. Brett Favre is the oldest active quarterback at this time.
http://en.wikipedia.org/wiki/List_of_current_National_Football_League_team_rosters Not limited to quarterbacks and not the most efficient thing around, but it'll get you there.
who are the 10 oldest quarterbacks in the nfl ?
jaguars, redskins, raiders, and bucaneers