Michael Petersen vs. John Sowders — Career Comparison

Looking at the career totals, Michael Petersen and John Sowders are fairly close on the surface numbers. John Sowders posted stronger numbers in ERA (4.29 vs 5.02) and home runs allowed (0.22 per nine innings vs 1.43). Michael Petersen had the advantage in WHIP (1.593 vs 1.698). By the career numbers, John Sowders 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.