Brian O'Connor vs. Frank Rosso — Career Comparison

Looking at the career totals, Brian O'Connor and Frank Rosso are fairly close on the surface numbers. Brian O'Connor posted stronger numbers in ERA (5.11 vs 9) and WHIP (1.865 vs 3.500). Frank Rosso had the advantage in home runs allowed (0 per nine innings vs 1.46). By the career numbers, Brian 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.