Alek Jacob vs. Michael Petersen — Career Comparison

On the career pitching numbers, Alek Jacob posted a stronger line than Michael Petersen. Alek Jacob posted stronger numbers in ERA (4.06 vs 5.02) and WHIP (1.216 vs 1.593). By the career numbers, Alek Jacob 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.