Among Roger Staubach's backups with the Dallas Cowboys between 1971 and 1979 were Craig Morton, Clint Longley, Danny White and Glenn Carano.
4
Tom Brady was backup for Drew Bledsoe in 2000 and part of 2001
tom brady
Kurt Warner, Aaron Rogers
Akili Smith. No one else
John Cartwright
0 ... either as a starter or backup.
Roger Staubach and Troy Aikman.
Favre was the backup for that season behind Don Majkowski who was injured that same season. Favre was brought in and became the starter from that point on.
Backup quarterbacks have been Rohan Davey, Matt Cassel, Brian Hoyer, Vinny Testaverde, Matt Gutierrez, and Ryan Mallett.
The San Francisco 49ers backup quarterbacks for their Super Bowl wins:Guy Benjamin (SB XVI)Matt Cavanaugh (SB XIX)Steve Young (SB XXIII and SB XXIV)Elvis Grbac (SB XXIX)
In 2008, the Philadelphia Eagles starting quarterback was Donovan McNabb. His backup was Kevin Kolb.