Bob Carpenter vs. Michael Kopech — Career Comparison

On the career pitching numbers, Bob Carpenter posted a stronger line than Michael Kopech. Bob Carpenter posted stronger numbers in ERA (3.6 vs 4.14) and home runs allowed (0.86 per nine innings vs 1.45). By the career numbers, Bob Carpenter 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.