Jack Mercer vs. Charles Witherow — Career Comparison

On the career pitching numbers, Jack Mercer posted a stronger line than Charles Witherow. Jack Mercer posted stronger numbers in ERA (0 vs 18) and WHIP (2.000 vs 4.000). 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.