John Firth vs. Grant Roberts — Career Comparison

Looking at the career totals, John Firth and Grant Roberts are fairly close on the surface numbers. Grant Roberts posted stronger numbers in ERA (4.25 vs 8) and WHIP (1.515 vs 2.111). John Firth had the advantage in home runs allowed (0 per nine innings vs 0.62). By the career numbers, Grant Roberts 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.