J. A. Happ vs. Matt Manning — Career Comparison

Looking at the career totals, J. A. Happ and Matt Manning are fairly close on the surface numbers. J. A. Happ had the edge in ERA (4.13 vs 4.43). By the career numbers, J. A. Happ 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.