Frank Castillo vs. Mike Johnson — Career Comparison

On the career pitching numbers, Frank Castillo posted a stronger line than Mike Johnson. Frank Castillo posted stronger numbers in ERA (4.56 vs 6.85) and WHIP (1.378 vs 1.665). By the career numbers, Frank Castillo 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.