Bill Mack vs. Jeff Richardson — Career Comparison

Looking at the career totals, Bill Mack and Jeff Richardson are fairly close on the surface numbers. Jeff Richardson posted stronger numbers in ERA (0 vs 3) and home runs allowed (0 per nine innings vs 1.5). Bill Mack had the advantage in WHIP (1.000 vs 3.000). By the career numbers, Jeff Richardson 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.