Ryan Borucki vs. Paul Castner — Career Comparison

Looking at the career totals, Ryan Borucki and Paul Castner are fairly close on the surface numbers. Ryan Borucki posted stronger numbers in ERA (4.28 vs 6.3) and WHIP (1.311 vs 1.900). Paul Castner had the advantage in home runs allowed (0 per nine innings vs 1.09). By the career numbers, Ryan Borucki 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.