Bill Essick vs. Frank Shellenback — Career Comparison

Looking at the career totals, Bill Essick and Frank Shellenback are fairly close on the surface numbers. Bill Essick had the edge in ERA (2.95 vs 3.06). By the career numbers, Bill Essick 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.