Casey Janssen vs. Les Willis — Career Comparison

Looking at the career totals, Casey Janssen and Les Willis are fairly close on the surface numbers. Les Willis posted stronger numbers in ERA (3.48 vs 3.63) and home runs allowed (0.61 per nine innings vs 0.88). Casey Janssen had the advantage in WHIP (1.238 vs 1.864). By the career numbers, Les Willis 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.