Frank Castillo vs. Shang Johnson — Career Comparison

On the career pitching numbers, Shang Johnson posted a stronger line than Frank Castillo. Shang Johnson posted stronger numbers in ERA (4.18 vs 4.56) and home runs allowed (0.2 per nine innings vs 1.07). 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.