Jonathan Pettibone vs. Ed Pierce — Career Comparison

Looking at the career totals, Jonathan Pettibone and Ed Pierce are fairly close on the surface numbers. Jonathan Pettibone posted stronger numbers in WHIP (1.564 vs 2.438) and home runs allowed (0.91 per nine innings vs 1.69). Ed Pierce had the advantage in ERA (3.38 vs 4.45). By the career numbers, Jonathan Pettibone 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.