>>150207525
see
>>150207508

They invented the title of best to describe the player who was putting up the best stats but didn't have the rings. It was invented in response to guys like Brady who had the most rings but wasn't winning MVPs or all-pros every season.
>which helped him pile up some of the best career stats
Meh, on a per game basis his peers put up better stats. It wasn't until they slowed down or retired that Brady caught up and eventually surpassed them. He's quantity over quality. See picrel.