Kendry Flores vs. Jerry Koosman — Career Comparison

Looking at the career totals, Kendry Flores and Jerry Koosman are fairly close on the surface numbers. Jerry Koosman posted stronger numbers in ERA (3.36 vs 4.02) and WHIP (1.290 vs 1.596). Kendry Flores had the advantage in home runs allowed (0 per nine innings vs 0.68). By the career numbers, Jerry Koosman 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.