Freddie Jackson vs. Tom Knowlson — Career Comparison

Looking at the career totals, Freddie Jackson and Tom Knowlson are fairly close on the surface numbers. Freddie Jackson posted stronger numbers in ERA (3 vs 3.49) and WHIP (1.111 vs 1.579). Tom Knowlson had the advantage in home runs allowed (0.09 per nine innings vs 1). By the career numbers, Freddie 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.