David Aardsma vs. Jack Flaherty — Career Comparison

Jack Flaherty built a career as a starting pitcher and David Aardsma as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jack Flaherty led in walk avoidance (BB%+ 100 vs 76), skill-based run prevention (DICE+ 114 vs 99), and run prevention (ERA+ 117 vs 109). David Aardsma held the edge in home run suppression (HR9+ 114 vs 105). Role difference aside, Jack Flaherty holds a clear edge on every meaningful shared measure.