Tom Acker vs. Mark Mercer — Career Comparison

On the career pitching numbers, Tom Acker posted a stronger line than Mark Mercer. Tom Acker posted stronger numbers in ERA (4.12 vs 4.7) and WHIP (1.407 vs 1.826). By the career numbers, Tom Acker 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.