John Firth vs. David Rollins — Career Comparison

Looking at the career totals, John Firth and David Rollins are fairly close on the surface numbers. David Rollins posted stronger numbers in ERA (7.6 vs 8) and WHIP (1.922 vs 2.111). John Firth had the advantage in home runs allowed (0 per nine innings vs 1.31). By the career numbers, David Rollins 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.