The best NFL player at every age, from 21-44 - ESPN - NFL Nation- ESPN
How does Tom Brady continue to defy the aging process? - The Boston Globe
What makes an NFL quarterback a journeyman? - Quora
Tom Brady And Drew Brees Have Blown Up The QB Aging Curve. What Comes Next?
Debunking the bogus “Colin Kaepernick is bad — he went 1-10” argument – ReadJack.com
Which is the greatest all-time North American pro sports franchise? - CelticsBlog
Remember When: QB George Blanda played until he was 48
Willie Thrower: A perfect name for a trailblazing quarterback
Age never defined Blanda on or off the field - ESPN