Al Jackson vs. Andrew Messenger — Career Comparison

On the career pitching numbers, Al Jackson posted a stronger line than Andrew Messenger. Al Jackson posted stronger numbers in ERA (3.98 vs 4.32) and WHIP (1.366 vs 1.680). By the career numbers, Al Jackson 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.