Don Arlich vs. Mike Cosgrove — Career Comparison

Looking at the career totals, Don Arlich and Mike Cosgrove are fairly close on the surface numbers. Mike Cosgrove posted stronger numbers in ERA (4.03 vs 8.1) and WHIP (1.544 vs 2.100). Don Arlich had the advantage in home runs allowed (0 per nine innings vs 0.43). By the career numbers, Mike Cosgrove 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.