Thomas Hatch vs. Michael Petersen — Career Comparison

Looking at the career totals, Thomas Hatch and Michael Petersen are fairly close on the surface numbers. Michael Petersen had the edge in ERA (5.02 vs 5.24). By the career numbers, Michael Petersen 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.