Alberto Castillo vs. Frank Diven — Career Comparison

Looking at the career totals, Alberto Castillo and Frank Diven are fairly close on the surface numbers. Frank Diven posted stronger numbers in WHIP (1.455 vs 1.541) and home runs allowed (0 per nine innings vs 1.19). Alberto Castillo had the advantage in ERA (4.33 vs 7.36). By the career numbers, Frank Diven 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.