Mike Parrott vs. Adam Peterson — Career Comparison

Looking at the career totals, Mike Parrott and Adam Peterson are fairly close on the surface numbers. Mike Parrott posted stronger numbers in ERA (4.87 vs 5.46) and home runs allowed (0.8 per nine innings vs 1.39). Adam Peterson had the advantage in WHIP (1.516 vs 1.620). By the career numbers, Mike Parrott 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.