Andy Boswell vs. Carlos Diaz — Career Comparison

Looking at the career totals, Andy Boswell and Carlos Diaz are fairly close on the surface numbers. Carlos Diaz posted stronger numbers in ERA (3.21 vs 5.91) and WHIP (1.453 vs 1.969). Andy Boswell had the advantage in home runs allowed (0.28 per nine innings vs 0.59). By the career numbers, Carlos Diaz 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.