Si Johnson vs. Izzy Leon — Career Comparison

On the career pitching numbers, Si Johnson posted a stronger line than Izzy Leon. Si Johnson posted stronger numbers in ERA (4.09 vs 5.35) and WHIP (1.401 vs 1.759). By the career numbers, Si 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.