Joe Nathan vs. Steve Stemle — Career Comparison

Looking at the career totals, Joe Nathan and Steve Stemle are fairly close on the surface numbers. Joe Nathan posted stronger numbers in ERA (2.87 vs 8.64) and WHIP (1.153 vs 1.920). Steve Stemle had the advantage in home runs allowed (0.54 per nine innings vs 0.82). By the career numbers, Joe Nathan 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.