Jack Aker vs. Mark Leiter — Career Comparison

Mark Leiter built a career as a starting pitcher and Jack Aker 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 Aker and 92 for Mark Leiter, with skill-based marks of DICE+ 88 and 93 respectively. Role difference aside, the slight lean goes to Mark Leiter — but these two were remarkably close on the shared metrics.