Mark Ettles vs. Jim Peterson — Career Comparison

Looking at the career totals, Mark Ettles and Jim Peterson are fairly close on the surface numbers. Jim Peterson posted stronger numbers in ERA (5.27 vs 6.5) and home runs allowed (0.74 per nine innings vs 2). Mark Ettles had the advantage in WHIP (1.556 vs 1.665). By the career numbers, Jim Peterson 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.