No, they can't. Every team has some bad things happen. The Cubs have had an unusual concentration of them the last two years. Not historically unlucky or anything, they've just come out on the short end of the variation stick a few times. The Cardinals didn't have any such seasons last year. For the rest of the NL Central, the closest similar situations for 2012 I can find is maybe Stubbs, Morgan and Barmes. The Cubs certainly could have been better with better decisions, but the variance has unquestionably (among the sane) not swung their way since probably 2010, maybe 2008.