Archie Manning Career Passer Rating

I'm too young to have seen Archie play, but I've heard from many Saints fans before my time about how great he was. Yes, I know the teams he played for were pretty bad. But I looked at a link to the Saints' passing records webpage, and I saw that Archie Manning's career passer rating is 68.6. That's just plain awful. I know that many people who love Archie will probably get upset for this post, but I thought it was interesting and wanted to put it up here.