Jim Mertz vs. Ben Rivera — Career Comparison

Looking at the career totals, Jim Mertz and Ben Rivera are fairly close on the surface numbers. Jim Mertz posted stronger numbers in WHIP (1.431 vs 1.489) and home runs allowed (0.54 per nine innings vs 0.9). Ben Rivera had the advantage in ERA (4.52 vs 4.63). By the career numbers, Jim Mertz 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.