T. J. Mathews vs. Ryan O'Rourke — Career Comparison

Looking at the career totals, T. J. Mathews and Ryan O'Rourke are fairly close on the surface numbers. T. J. Mathews had the edge in ERA (3.82 vs 4.84). By the career numbers, T. J. Mathews 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.