Ariel Peña vs. Paul Penson — Career Comparison

Looking at the career totals, Ariel Peña and Paul Penson are fairly close on the surface numbers. Paul Penson posted stronger numbers in ERA (4.5 vs 5.59) and home runs allowed (0.56 per nine innings vs 1.55). Ariel Peña had the advantage in WHIP (1.621 vs 1.750). By the career numbers, Paul Penson 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.