1 - Kurt Warner
Kurt Warner started for 10 games in 2005 and for the first four games of 2006 before he relinquished the job to rookie Matt Leinart. However, by Week 17, Warner was back in the driver’s seat and put up a stellar performance against the San Diego Chargers, throwing for 356 yards with a touchdown, zero picks, and a 116.1 quarterback rating.
Warner also opened the 2007 season as the backup, but he saw more playing time in Week 3. And following a mid-season injury to Leinart, he took the job and never looked back. Not only is Therefore, Warner is easily the best backup quarterback on this list, and I’ve considered him to be the best quarterback between 1993 and 2022.
Warner is also in a unique spot of being a backup quarterback who won the starting job in not just one, but two cities. Ironically, he first accomplished the feat in St. Louis as a member of the Rams, the city the Arizona Cardinals played in before they moved to the desert in 1988.
(Statistics provided by Pro-Football-Reference)