Of the 10 oldest QBs as of 2 years ago, 6 have retired: Derek Anderson, Philip Rivers, Matt Cassel, Matt Schaub, Eli Manning, and Drew Brees.
https://www.sportscasting.com/10-of-the-oldest-quarterbacks-in-the-nfl-in-2019/
Remaining, you have: Tom Brady (44), Ben Roethlisberger (39), Ryan...