Diego Moreno vs. Michael Petersen — Career Comparison

On the career pitching numbers, Diego Moreno posted a stronger line than Michael Petersen. Diego Moreno posted stronger numbers in WHIP (1.250 vs 1.593) and home runs allowed (1.13 per nine innings vs 1.43). By the career numbers, Diego Moreno 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.