2 years ago, Luis Perdomo looked like he would stay in the starting rotation for years to come. At times, he was simply dominant. Of course there were times when the wheels would come off, but that’s normal of a rule 5 trial by fire pitcher in his early 20’s.
2018 came along and things got much, much worse. He couldn’t find the plate, and when he did he got shelled. Demoted to AAA, he spent time becoming a more mature student of the game. He pitched well as a reliever during his September call up.