Mark Gubicza vs. Jack O'Connor — Career Comparison

Mark Gubicza built a career as a starting pitcher and Jack O'Connor as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Mark Gubicza led in home run suppression (HR9+ 131 vs 89), run prevention (ERA+ 108 vs 80), and walk avoidance (BB%+ 101 vs 82). Role difference aside, Mark Gubicza holds a clear edge on every meaningful shared measure.