Joel Johnston vs. Gregg Olson — Career Comparison

Looking at the career totals, Joel Johnston and Gregg Olson are fairly close on the surface numbers. Gregg Olson posted stronger numbers in ERA (3.46 vs 4.31) and home runs allowed (0.62 per nine innings vs 1.05). Joel Johnston had the advantage in WHIP (1.296 vs 1.442). By the career numbers, Gregg Olson 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.