Howard Armstrong vs. Mark Mercer — Career Comparison

On the career pitching numbers, Howard Armstrong posted a stronger line than Mark Mercer. Howard Armstrong posted stronger numbers in ERA (0 vs 4.7) and WHIP (1.333 vs 1.826). By the career numbers, Howard Armstrong 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.