Walter Johnson vs. Michael Wacha — Career Comparison

On the career pitching numbers, Walter Johnson posted a stronger line than Michael Wacha. Walter Johnson posted stronger numbers in ERA (2.17 vs 3.89) and WHIP (1.061 vs 1.286). By the career numbers, Walter Johnson 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.