Shang Johnson vs. Rolla Mapel — Career Comparison

Looking at the career totals, Shang Johnson and Rolla Mapel are fairly close on the surface numbers. Shang Johnson posted stronger numbers in ERA (4.18 vs 4.5) and WHIP (1.347 vs 1.700). Rolla Mapel had the advantage in home runs allowed (0 per nine innings vs 0.2). By the career numbers, Shang 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.