Spencer Arrighetti vs. Shang Johnson — Career Comparison

On the career pitching numbers, Shang Johnson posted a stronger line than Spencer Arrighetti. Shang Johnson posted stronger numbers in ERA (4.18 vs 4.69) and WHIP (1.347 vs 1.409). 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.