Mike Cosgrove vs. Jay Jackson — Career Comparison

Looking at the career totals, Mike Cosgrove and Jay Jackson are fairly close on the surface numbers. Mike Cosgrove posted stronger numbers in ERA (4.03 vs 4.43) and home runs allowed (0.43 per nine innings vs 1.58). Jay Jackson had the advantage in WHIP (1.258 vs 1.544). 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.