Keith Butler vs. Joel Johnston — Career Comparison

Looking at the career totals, Keith Butler and Joel Johnston are fairly close on the surface numbers. Joel Johnston posted stronger numbers in ERA (4.31 vs 6.14) and WHIP (1.296 vs 1.409). Keith Butler had the advantage in home runs allowed (0 per nine innings vs 1.05). By the career numbers, Joel Johnston 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.