John Firth vs. Rob Zastryzny — Career Comparison

Looking at the career totals, John Firth and Rob Zastryzny are fairly close on the surface numbers. Rob Zastryzny posted stronger numbers in ERA (3.84 vs 8) and WHIP (1.449 vs 2.111). John Firth had the advantage in home runs allowed (0 per nine innings vs 0.61). By the career numbers, Rob Zastryzny 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.