Fran Tarkenton held the NFL record for passing touchdowns for a league-record 24 years before Dan Marino threw his 343rd in 1995.
Marino held it for 12 years before Brett Favre threw his 421st in 2007.
Favre held it for seven years until Peyton Manning threw his 509th on Sunday.
Naturally, the discussion now has moved to whether anyone will ever break Manning's record. At 38, he also shows no signs of decline.
For gosh sakes, the guy just threw six TDs in five days and sits at 513.
Manning losing that record might not seem possible at the moment, although Drew Brees is three years younger and on a similar pace with 374.
But the way the NFL is going, don't bet against that record falling.
With that in mind, here are three records we think will never fall: