Relief pitchers in today’s game are extremely volatile and the Baltimore Orioles have a comprehensive understanding of this. The O’s used 30 pitchers in 2018, including Jace Peterson and Danny Valencia and almost none of them had any success.
Richard Bleier was good before he got hurt, Darren O’Day was serviceable before he was traded, and Paul Fry posted a respectable 3.11 FIP with a 36/15 K/UIBB.
Outside of those three, the Orioles bullpen was a revolving door of mediocrity, occasionally posting average results but more frequently posting terrible ones.