David Aardsma vs. Johnny Hetki — Career Comparison

Looking at the career totals, David Aardsma and Johnny Hetki are fairly close on the surface numbers. Johnny Hetki posted stronger numbers in WHIP (1.412 vs 1.487) and home runs allowed (0.72 per nine innings vs 1.09). David Aardsma had the advantage in ERA (4.27 vs 4.39). By the career numbers, Johnny Hetki 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.