Clayton Mortensen vs. Mason Thompson — Career Comparison

Looking at the career totals, Clayton Mortensen and Mason Thompson are fairly close on the surface numbers. Clayton Mortensen posted stronger numbers in ERA (4.68 vs 5.21) and WHIP (1.470 vs 1.667). Mason Thompson had the advantage in home runs allowed (0.87 per nine innings vs 1.4). By the career numbers, Clayton Mortensen 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.