As already stated, they were very good last year by basically every metric.
By the last couple months of the season, the pen was TOAST.
When they were healthy they were the #1 pen in baseball. But after several months of mismanagement and overuse, Morrow’s arm was destroyed, Cishek was completely burnt out, Strop hurt himself and not one single pitcher was reliable.
They brought in Chavez who was basically duct tape for a few weeks but by that time it was too late.