Jack Armstrong vs. Michael Grove — Career Comparison

Looking at the career totals, Jack Armstrong and Michael Grove are fairly close on the surface numbers. Jack Armstrong posted stronger numbers in ERA (4.58 vs 5.48) and home runs allowed (1.17 per nine innings vs 1.45). Michael Grove had the advantage in WHIP (1.386 vs 1.458). By the career numbers, Jack Armstrong 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.