Ben Callahan vs. Mike Walker — Career Comparison

Looking at the career totals, Ben Callahan and Mike Walker are fairly close on the surface numbers. Mike Walker posted stronger numbers in ERA (7.36 vs 12.54) and WHIP (2.250 vs 2.571). Ben Callahan had the advantage in home runs allowed (0 per nine innings vs 2.45). By the career numbers, Mike Walker 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.