William Matthews vs. Mark Mercer — Career Comparison

On the career pitching numbers, William Matthews posted a stronger line than Mark Mercer. William Matthews posted stronger numbers in ERA (3.24 vs 4.7) and WHIP (1.560 vs 1.826). By the career numbers, William Matthews 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.