In honor of Peyton Manning becoming the second player in NFL history to throw more than 500 touchdown passes, I put together a little graphic to show how he compares to the other QB with more than 500, Brett Favre.
Looks like Favre slowed at the end of his career, but Peyton has only accelerated in the last few seasons with the Broncos. I have no doubts he will overtake Favre and become the leader in the next month.
Data from The Football Database
UPDATE: After sharing to Reddit, I have made a few more plots, and I include them below.