Marco Estrada vs. Frank Shellenback — Career Comparison

Looking at the career totals, Marco Estrada and Frank Shellenback are fairly close on the surface numbers. Frank Shellenback posted stronger numbers in ERA (3.06 vs 4.29) and home runs allowed (0.08 per nine innings vs 1.43). Marco Estrada had the advantage in WHIP (1.219 vs 1.424). By the career numbers, Frank Shellenback 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.