The Pittsburgh Pirates entered the 2019 season with the belief that their strong pitching staff would lead them to the post-season again. While injuries and struggles have plagued the Pirates pitchers all season, it doesn’t make the future look any less bleak. Especially when one of those pitchers was among one of the best pitchers in baseball just a season ago.
Earlier this year, I wrote about Trevor Williams and his potential battle with the regression bug, mainly by emphasizing the difference between his ERA & xFIP:
Williams’ ERA- was 79 and his xFIP- was 112, which is a 39 point difference.