Nine 2018 Pitcher Strikeout Rate Surgers — A Review
In mid-February, I used my pitcher xK% equation to highlight nine pitchers that may have strikeout rate upside for 2018. The important thing to remember is that xK% is not a projection and isn’t meant to be forward-looking. Rather, it’s descriptive, or backward looking, the same way you might think about FIP/xFIP/SIERA. I have found many pitchers who consistently over/underperform their xK% marks for whatever reason, so I never blindly use previous xK% marks as my next season forecast. That said, let’s find out how the pitchers with the greatest positive divergence between 2017 K% and 2017 xK% performed in 2018.