We're just....short in the rotation and short in the pen, and both of those things were pretty obvious 4-6 weeks ago. A good bullpen (very statistical based analysis coming) is going to have 1-2 consistently good arms, and then 2-4 guys who are going to run hot and cold. We've got Palencia, Keller, Thielbar, none of them elite (27th, 30th, 44th in fWAR, 15th, 17th, 39th in FIP) and then we just....bet low on Kittredge and Soroka? With....maybe 3 healthy starters at any given point?
This is also not exact science, but sort qualified relievers by FIP, and in the top 100, you have 20 pitchers listed as pitching for more than one team, which is a rough approximation for being traded (or dumbly waived at some point I guess). We got one of them, Kittredge, 62nd. And did basically nothing else besides a tenth guy off the bench. It wasn't enough.