Edwin Jackson vs. Lefty Robinson — Career Comparison

Looking at the career totals, Edwin Jackson and Lefty Robinson are fairly close on the surface numbers. Edwin Jackson posted stronger numbers in ERA (4.78 vs 6.95) and WHIP (1.486 vs 1.728). Lefty Robinson had the advantage in home runs allowed (0.1 per nine innings vs 1.14). By the career numbers, Edwin 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.