Aaron Ashby’s 4.55 ERA (107 ERA-) may not look impressive, but his debut season should be considered a success.
First of all, he performed far better than that ERA suggests. The top prospect posted a 3.03 xERA, 3.58 FIP, 3.18 SIERA, and 84 DRA-. His 29.3% strikeout rate and 61.3% ground ball rate were excellent. Secondly, Ashby allowed 13 of his 20 runs in two of his 13 outings. He coughed up seven runs in his MLB debut and another six in his final regular-season appearance, both of which lasted under an inning. In between was a 30-inning stretch with a 1.