John Jackson vs. Tom Knowlson — Career Comparison

On the career pitching numbers, Tom Knowlson posted a stronger line than John Jackson. Tom Knowlson posted stronger numbers in ERA (3.49 vs 6) and WHIP (1.579 vs 2.019). By the career numbers, Tom Knowlson 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.