Frank Bates vs. Leo Rosales — Career Comparison

Looking at the career totals, Frank Bates and Leo Rosales are fairly close on the surface numbers. Leo Rosales posted stronger numbers in ERA (5.01 vs 6.33) and WHIP (1.505 vs 2.082). Frank Bates had the advantage in home runs allowed (0.28 per nine innings vs 0.88). By the career numbers, Leo Rosales 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.