Back in May 2023, I looked at the struggles of the Diamondbacks bullpen during the time of Mike Hazen as GM. At that point, the team has been below average in the “holy trinity” of pitching metrics - ERA, FIP and xFIP - every year since 2019, but there was some reason for hope, with an xFIP which, at the time, ranked a respectable twelfth for the season by xFIP. Unfortunately, results the rest of the season did not go the D-backs’ way. They ended the year in the bottom half there, in seventeenth place. And that was better than they managed by ERA (18th), FIP (21st) or fWAR (24th).
Mike Hazen still has a bullpen problem...
