J. P. Feyereisen vs. Yusmeiro Petit — Career Comparison

On the career pitching numbers, J. P. Feyereisen posted a stronger line than Yusmeiro Petit. J. P. Feyereisen posted stronger numbers in ERA (3.27 vs 3.93) and home runs allowed (1.12 per nine innings vs 1.36). By the career numbers, J. P. Feyereisen 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.