Tommy Greene vs. John Jackson — Career Comparison

Looking at the career totals, Tommy Greene and John Jackson are fairly close on the surface numbers. Tommy Greene posted stronger numbers in ERA (4.14 vs 6) and WHIP (1.342 vs 2.019). John Jackson had the advantage in home runs allowed (0.5 per nine innings vs 0.89). By the career numbers, Tommy Greene 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.