Albert Abreu vs. Mark Mercer — Career Comparison

Looking at the career totals, Albert Abreu and Mark Mercer are fairly close on the surface numbers. Albert Abreu posted stronger numbers in ERA (4.58 vs 4.7) and WHIP (1.459 vs 1.826). Mark Mercer had the advantage in home runs allowed (1.17 per nine innings vs 1.53). By the career numbers, Albert Abreu 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.