Jack Armstrong vs. Xavier Hernandez — Career Comparison

Jack Armstrong built a career as a starting pitcher and Xavier Hernandez as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Their run-prevention marks were nearly identical — ERA+ of 89 for Jack Armstrong and 85 for Xavier Hernandez, with skill-based marks of DICE+ 89 and 90 respectively. Role difference aside, the slight lean goes to Xavier Hernandez — but these two were remarkably close on the shared metrics.