John Firth vs. Jeff Lahti — Career Comparison

Looking at the career totals, John Firth and Jeff Lahti are fairly close on the surface numbers. Jeff Lahti posted stronger numbers in ERA (3.12 vs 8) and WHIP (1.416 vs 2.111). John Firth had the advantage in home runs allowed (0 per nine innings vs 0.44). By the career numbers, Jeff Lahti 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.