Bill Mountjoy vs. John Valentine — Career Comparison

Looking at the career totals, Bill Mountjoy and John Valentine are fairly close on the surface numbers. Bill Mountjoy posted stronger numbers in ERA (3.25 vs 3.53) and WHIP (1.219 vs 1.441). John Valentine had the advantage in home runs allowed (0 per nine innings vs 0.2). By the career numbers, Bill Mountjoy 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.