Martin Perez vs. Lawrence Simpson — Career Comparison

On the career pitching numbers, Lawrence Simpson posted a stronger line than Martin Perez. Lawrence Simpson posted stronger numbers in ERA (4.3 vs 4.41) and home runs allowed (0.77 per nine innings vs 1.05). By the career numbers, Lawrence Simpson 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.