xwOBA against
Expected wOBA allowed — what hitters' wOBA "should" be based on contact quality.
What xwOBA against means
The pitcher version of xwOBA. Like xERA but on the wOBA scale (~.320 = average). Strips defense and luck.
What counts as a good xwOBA against
Lower is better — roughly .350 is poor, .320 average, .290 good, and .260 or better elite.
Also written
xwoba_p · xwoba_pitcher · xwOBA Ag · xwOBA-a · xwoba_ag
Source
Statcast