John Rocker vs. Jack Theis — Career Comparison

Looking at the career totals, John Rocker and Jack Theis are fairly close on the surface numbers. Jack Theis posted stronger numbers in ERA (0 vs 3.42) and home runs allowed (0 per nine innings vs 0.81). John Rocker had the advantage in WHIP (1.492 vs 2.000). By the career numbers, Jack Theis 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.