Swing and miss teams (those who strike out a lot) can be very up and down.
See: Braves. They are what happens when you have mediocre pitching combined with swing and miss. And we have enough contact guys (Span, Rendon, Werth, Ramos) to make up for our swingers (Harper, Desi, Cabrera/Espi, Adam when he's cold), whereas the Braves have...Freeman, who is slumping, hard. We also have much better pitching.