Mike Armstrong vs. Al Jackson — Career Comparison

Al Jackson built a career as a starting pitcher and Mike Armstrong as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Mike Armstrong led in strikeout rate (K%+ 107 vs 76), run prevention (ERA+ 110 vs 95), and skill-based run prevention (DICE+ 97 vs 95). Al Jackson held the edge in walk avoidance (BB%+ 112 vs 90). Keeping the role difference in mind, the edge still goes to Mike Armstrong.