• The article highlights some of the best backup quarterbacks in NFL history, with a focus on Nick Foles, who recently announced his retirement. Foles is best known for leading the Philadelphia Eagles to a Super Bowl victory in 2018 after starting quarterback Carson Wentz was injured. The article notes that Foles' performance in that game cemented his legacy as one of the greatest backup quarterbacks ever.

• The article also mentions other notable backup quarterbacks, such as Matt Cassel, who stepped in for Tom Brady when he was injured in 2008 and led the New England Patriots to an 11-5 record. The article also highlights the contributions of Doug Flutie, who had a successful career as a backup and started several games over the course of his career.

• Finally, the article discusses the importance of having a reliable backup quarterback in the NFL. It notes that with the physical demands of the position, starting quarterbacks are often injured, and having a capable backup can make or break a team's season. The article suggests that the best backup quarterbacks are not only skilled players but also have the mental toughness and leadership abilities to step up when called upon.