Dave Haas vs. Mike O'Connor — Career Comparison

Looking at the career totals, Dave Haas and Mike O'Connor are fairly close on the surface numbers. Mike O'Connor posted stronger numbers in WHIP (1.459 vs 1.654) and home runs allowed (1.34 per nine innings vs 1.61). Dave Haas had the advantage in ERA (4.84 vs 5.3). By the career numbers, Mike O'Connor 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.