Dave Haas vs. Izzy Leon — Career Comparison

Looking at the career totals, Dave Haas and Izzy Leon are fairly close on the surface numbers. Dave Haas posted stronger numbers in ERA (4.84 vs 5.35) and WHIP (1.654 vs 1.759). Izzy Leon had the advantage in home runs allowed (0.7 per nine innings vs 1.61). By the career numbers, Dave Haas 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.