Joe Boyle vs. Kenny Rosenberg — Career Comparison

Looking at the career totals, Joe Boyle and Kenny Rosenberg are fairly close on the surface numbers. Joe Boyle posted stronger numbers in WHIP (1.444 vs 1.507) and home runs allowed (0.86 per nine innings vs 1.2). Kenny Rosenberg had the advantage in ERA (4.66 vs 4.98). By the career numbers, Joe Boyle 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.