Bobby Castillo vs. Frederick Fass — Career Comparison

Looking at the career totals, Bobby Castillo and Frederick Fass are fairly close on the surface numbers. Bobby Castillo posted stronger numbers in ERA (3.94 vs 10.34) and WHIP (1.431 vs 2.106). Frederick Fass had the advantage in home runs allowed (0.57 per nine innings vs 0.88). By the career numbers, Bobby 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.