Spencer Bivens vs. Rob Zastryzny — Career Comparison

Looking at the career totals, Spencer Bivens and Rob Zastryzny are fairly close on the surface numbers. Spencer Bivens posted stronger numbers in ERA (3.68 vs 3.84) and WHIP (1.296 vs 1.449). Rob Zastryzny had the advantage in home runs allowed (0.61 per nine innings vs 1.04). By the career numbers, Spencer Bivens 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.