Adam Peterson vs. Bob Porterfield — Career Comparison

On the career pitching numbers, Bob Porterfield posted a stronger line than Adam Peterson. Bob Porterfield posted stronger numbers in ERA (3.79 vs 5.46) and WHIP (1.367 vs 1.516). By the career numbers, Bob Porterfield 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.