John Andrews vs. Mark Mercer — Career Comparison

Looking at the career totals, John Andrews and Mark Mercer are fairly close on the surface numbers. John Andrews posted stronger numbers in ERA (4.42 vs 4.7) and WHIP (1.527 vs 1.826). Mark Mercer had the advantage in home runs allowed (1.17 per nine innings vs 1.47). By the career numbers, John Andrews 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.