Jack Mercer vs. Amos Willingham — Career Comparison

Looking at the career totals, Jack Mercer and Amos Willingham are fairly close on the surface numbers. Jack Mercer posted stronger numbers in ERA (0 vs 7.11) and home runs allowed (0 per nine innings vs 3.2). Amos Willingham had the advantage in WHIP (1.895 vs 2.000). By the career numbers, Jack Mercer 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.