Around Christmas, RJ did a piece on Percival's wOBAA as it related to his various DL trips. Seeing all the talk about outrighting Troy or how he should be used, I figured it might be a good time to revisit his year last year. I again broke his season down into 4 parts (by DL stint), and this time I figured we'd look at his FIP. I used the basic FIP formula [(13*HR)+(3*BB-IBB+HBP)-(2*K)/IP] and used 3.13 for the league adjustment because that's what it was for the AL last year. Here's a lovely table depicting his performance:
As you can see, before the first DL trip he was fairly effective. With each DL stint, he got worse and worse and worse...
In looking at this I wouldn't be afraid to let him start at the back-end of the bullpen, but the second he starts walking people I'd send him packing.
Here's a graph so you can really see the sucktitude: