Zach Agnos vs. Mark Mercer — Career Comparison

Looking at the career totals, Zach Agnos and Mark Mercer are fairly close on the surface numbers. Mark Mercer posted stronger numbers in ERA (4.7 vs 6.61) and home runs allowed (1.17 per nine innings vs 1.44). Zach Agnos had the advantage in WHIP (1.532 vs 1.826). By the career numbers, Mark Mercer 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.