Johnny Hetki vs. Ken Penner — Career Comparison

Looking at the career totals, Johnny Hetki and Ken Penner are fairly close on the surface numbers. Ken Penner posted stronger numbers in ERA (3.55 vs 4.39) and home runs allowed (0.36 per nine innings vs 0.72). Johnny Hetki had the advantage in WHIP (1.412 vs 1.500). By the career numbers, Ken Penner 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.