That's what I've been trying to figure out since I first saw the list of NFL Pro Bowlers released by NFL.com today.
The obvious answer is that he's Brett Favre and he's getting the "Cal Ripken treatment," being considered an All Star more for his past achievements than for what he's done this season. Because this year Favre has not been putting up Pro Bowl numbers.
There are six quarterbacks in the AFC with better passer ratings than Favre, which isn't to say that should be the only stat looked at. But how does Favre make this team over Philip Rivers, who has thrown 28 TDs and 11 INTs to Favre's 21 and 17, respectively. You could probably make a case for Matt Cassel, Matt Schaub and even Chad Pennington over the "gunslinger."