Rolla Mapel vs. Norman Plitt — Career Comparison

On the career pitching numbers, Rolla Mapel posted a stronger line than Norman Plitt. Rolla Mapel posted stronger numbers in ERA (4.5 vs 4.77) and home runs allowed (0 per nine innings vs 0.38). By the career numbers, Rolla Mapel 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.