Pedro Martinez vs. Jim Roberts — Career Comparison

Looking at the career totals, Pedro Martinez and Jim Roberts are fairly close on the surface numbers. Pedro Martinez posted stronger numbers in ERA (2.93 vs 7.18) and WHIP (1.065 vs 1.899). Jim Roberts had the advantage in home runs allowed (0.34 per nine innings vs 0.76). By the career numbers, Pedro Martinez 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.