John Allen vs. Mike Willis — Career Comparison

Looking at the career totals, John Allen and Mike Willis are fairly close on the surface numbers. Mike Willis posted stronger numbers in ERA (4.59 vs 18) and WHIP (1.524 vs 2.000). John Allen had the advantage in home runs allowed (0 per nine innings vs 1.09). By the career numbers, Mike Willis 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.