Bill Mack vs. Esmerling Vasquez — Career Comparison

Looking at the career totals, Bill Mack and Esmerling Vasquez are fairly close on the surface numbers. Bill Mack posted stronger numbers in ERA (3 vs 4.86) and WHIP (1.000 vs 1.559). Esmerling Vasquez had the advantage in home runs allowed (0.75 per nine innings vs 1.5). By the career numbers, Bill Mack 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.