Mark Johnson vs. Jim Siwy — Career Comparison

On the career pitching numbers, Jim Siwy posted a stronger line than Mark Johnson. Jim Siwy posted stronger numbers in ERA (7.15 vs 7.5) and home runs allowed (0.79 per nine innings vs 1.13). By the career numbers, Jim Siwy had the better of this comparison — though ERA and WHIP alone don't account for era, park factors, or the defenses each pitcher worked behind.