Trevor McDonald vs. Andy O'Connor — Career Comparison

Looking at the career totals, Trevor McDonald and Andy O'Connor are fairly close on the surface numbers. Trevor McDonald posted stronger numbers in ERA (1.5 vs 10.13) and WHIP (0.889 vs 2.750). Andy O'Connor had the advantage in home runs allowed (0 per nine innings vs 0.5). By the career numbers, Trevor McDonald 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.