Kelvin Herrera vs. Tom Thomas — Career Comparison

Looking at the career totals, Kelvin Herrera and Tom Thomas are fairly close on the surface numbers. Kelvin Herrera posted stronger numbers in ERA (3.21 vs 3.31) and WHIP (1.236 vs 1.355). Tom Thomas had the advantage in home runs allowed (0.52 per nine innings vs 0.88). By the career numbers, Kelvin Herrera 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.