The 2011 Cardinals squeaked in as the NL wild card despite giving up 4.3 runs a game in the regular season in a year when the NL average was 4.1. Their offense scored 4.7 a game, carrying them to 90 wins. Their pitching and defense did not step up in the playoffs either - they allowed the same 4.3 runs per game in the postseason. The already good offense kicked it up a notch to the tune of 5.6 runs/game.
Not park adjusting, and rounding to the tenth decimal, the 2011 Cards join the '87 Twins as the only champs to have had below-average run prevention in the regular season.