Lefty Hopper vs. Tom Johnson — Career Comparison

Looking at the career totals, Lefty Hopper and Tom Johnson are fairly close on the surface numbers. Tom Johnson posted stronger numbers in ERA (3.39 vs 4.91) and WHIP (1.434 vs 1.727). Lefty Hopper had the advantage in home runs allowed (0 per nine innings vs 0.63). By the career numbers, Tom 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.