Casey Janssen vs. Frank Mountain — Career Comparison

Looking at the career totals, Casey Janssen and Frank Mountain are fairly close on the surface numbers. Frank Mountain posted stronger numbers in ERA (3.47 vs 3.63) and home runs allowed (0.17 per nine innings vs 0.88). Casey Janssen had the advantage in WHIP (1.238 vs 1.301). By the career numbers, Frank Mountain 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.