Bill Hoffer vs. Isaac Mattson — Career Comparison

Looking at the career totals, Bill Hoffer and Isaac Mattson are fairly close on the surface numbers. Isaac Mattson posted stronger numbers in ERA (2.98 vs 3.75) and WHIP (1.256 vs 1.424). Bill Hoffer had the advantage in home runs allowed (0.16 per nine innings vs 0.63). By the career numbers, Isaac Mattson 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.