There are reasons why teams that are not expected to win it all -- and do -- often come up short the next time around. When your margin of error is slim, losing your best hitter - as with the Luis Gonzalez injury - can be lethal. That said, the rest of the D-Backs' offense is stronger this year than last, so if the bullpen doesn't implode, maybe they hang in there. The other problem is, if Johnson and Schilling aren't perfect again, they're dead meat.