John Firth vs. Randy Rosario — Career Comparison

Looking at the career totals, John Firth and Randy Rosario are fairly close on the surface numbers. Randy Rosario posted stronger numbers in ERA (5 vs 8) and WHIP (1.620 vs 2.111). John Firth had the advantage in home runs allowed (0 per nine innings vs 1.22). By the career numbers, Randy Rosario 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.