Alexis Diaz vs. Ken Penner — Career Comparison

Looking at the career totals, Alexis Diaz and Ken Penner are fairly close on the surface numbers. Alexis Diaz posted stronger numbers in ERA (3.38 vs 3.55) and WHIP (1.195 vs 1.500). Ken Penner had the advantage in home runs allowed (0.36 per nine innings vs 0.92). By the career numbers, Alexis Diaz 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.