If we believed that there were an 87 win team before Yo's injury, they are probably around an 84 win team without. They are still above average but probably not by much. Remember, it's the offense that's supposed to be better than average, not the pitching (which certainly isn't anymore). Suppan, Bush, Villy and Parra should collectively be only a little below average, so Sheets realistically pulls them up to around average. If the offense can start performing as expected, they are legitimately an above average team. Just not by enough to not need some balls to bounce their way to get to the playoffs. Remember, most teams are only a few games away from being average to begin with. Even average teams make the playoffs with some luck (winning a bunch of 1 run games, big hits in big situations, etc...)