The Colorado Rockies currently sit 12th in baseball and sixth in the National League in reliever ERA at 4.02. Their four blown saves are also slightly above middle-of-the-pack. This is a huge improvement for a team that had one of the worst bullpens in baseball last season. But most of that success came early in the season.
In the last 30 days, Rockies relievers are in the bottom 10 in baseball in ERA. Some of that has come from stress and overwork that is the result of an under-performing starting rotation.
Oddly enough, though, the majority of relievers have actually seen a surprising amount of success in 2019.