Mark Mercer vs. Trent Thornton — Career Comparison

Looking at the career totals, Mark Mercer and Trent Thornton are fairly close on the surface numbers. Trent Thornton posted stronger numbers in ERA (4.38 vs 4.7) and WHIP (1.344 vs 1.826). Mark Mercer had the advantage in home runs allowed (1.17 per nine innings vs 1.39). By the career numbers, Trent Thornton 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.