S. Johnson vs. Si Simmons — Career Comparison

Looking at the career totals, S. Johnson and Si Simmons are fairly close on the surface numbers. Si Simmons posted stronger numbers in ERA (5.4 vs 67.5) and WHIP (1.500 vs 9.000). S. Johnson had the advantage in home runs allowed (0 per nine innings vs 1.35). By the career numbers, Si Simmons 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.