Grant Jackson vs. Joel Johnston — Career Comparison

Looking at the career totals, Grant Jackson and Joel Johnston are fairly close on the surface numbers. Grant Jackson posted stronger numbers in ERA (3.46 vs 4.31) and home runs allowed (0.72 per nine innings vs 1.05). Joel Johnston had the advantage in WHIP (1.296 vs 1.365). By the career numbers, Grant Jackson 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.