Dave Haas vs. Ole Olsen — Career Comparison

Looking at the career totals, Dave Haas and Ole Olsen are fairly close on the surface numbers. Ole Olsen posted stronger numbers in WHIP (1.379 vs 1.654) and home runs allowed (0.45 per nine innings vs 1.61). Dave Haas had the advantage in ERA (4.84 vs 4.95). By the career numbers, Ole Olsen 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.