Yeah, I get the whole "Arena Football player and Hy-Vee shelf stocker leads the greatest offense ever assembled" aspect of it, but if we analyze VX's quote here:
It kind of looks like he's speaking specifically of championship underdogs, which the 99 Rams most certainly were not, even if the Titans were an underrated team because they possibly-forward-lateral'd and playoff-game-against-Peyton-Manning'd their way to the big dance. He elaborated earlier in the thread and said he meant the whole "last season sucked and Trent Green's knee is ruined" aspect of it, but it seems like apples and oranges with his other two examples. The Pats and the Giants struggled and shocked the world and so forth, while it was pretty clear pretty early that the Rams were the team to beat in the NFC, if not the league, depending on how much stock you put in that 14-2 Jaguars team. Less of an "underdog," per se, and more of a "Go figure, the Rams are good this year" as we saw with the Dolphins and the Falcons this year. I guess it depends on your definition of underdog.