Brad Keller vs. Joe Willis — Career Comparison

Looking at the career totals, Brad Keller and Joe Willis are fairly close on the surface numbers. Brad Keller posted stronger numbers in ERA (4.14 vs 4.63) and WHIP (1.414 vs 1.568). Joe Willis had the advantage in home runs allowed (0.17 per nine innings vs 0.85). By the career numbers, Brad Keller 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.