They did win last year, but their team looked nothing like the same team for most of the season. In the last few years, they've been known for their high powered offense, putting up tons of receiving yards every game. This year, their offense was pretty bad, especially their receiving during regular season. But their defense was playing well and allowed them to make the playoffs. If you look at power rankings from the first week of the playoffs, most people had them in the bottom part of their rankings.

Not sure what you're arguing here. I didn't call it an "upset". I said they weren't the "heavily favored team".