Michael Kopech vs. Marty O'Toole — Career Comparison

Looking at the career totals, Michael Kopech and Marty O'Toole are fairly close on the surface numbers. Marty O'Toole posted stronger numbers in ERA (3.21 vs 4.14) and home runs allowed (0.17 per nine innings vs 1.45). Michael Kopech had the advantage in WHIP (1.333 vs 1.425). By the career numbers, Marty O'Toole 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.