Mark Mercer vs. Duane Underwood — Career Comparison

Looking at the career totals, Mark Mercer and Duane Underwood are fairly close on the surface numbers. Duane Underwood had the edge in WHIP (1.453 vs 1.826). By the career numbers, Duane Underwood 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.