Mike Hartley vs. Al Jackson — Career Comparison

Al Jackson built a career as a starting pitcher and Mike Hartley as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Mike Hartley led in strikeout rate (K%+ 120 vs 76), run prevention (ERA+ 105 vs 95), and skill-based run prevention (DICE+ 103 vs 95). Al Jackson held the edge in walk avoidance (BB%+ 112 vs 93). Role difference aside, Mike Hartley holds a clear edge on every meaningful shared measure.