Paul Hartzell vs. Robbie Ross — Career Comparison

Paul Hartzell built a career as a starting pitcher and Robbie Ross as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Robbie Ross led in home run suppression (HR9+ 183 vs 145), strikeout rate (K%+ 89 vs 67), and run prevention (ERA+ 115 vs 109). Paul Hartzell held the edge in walk avoidance (BB%+ 141 vs 105). Role difference aside, Robbie Ross holds a clear edge on every meaningful shared measure.