Brian O'Connor vs. John Rooney — Career Comparison

Looking at the career totals, Brian O'Connor and John Rooney are fairly close on the surface numbers. Brian O'Connor posted stronger numbers in ERA (5.11 vs 6.75) and home runs allowed (1.46 per nine innings vs 6.75). John Rooney had the advantage in WHIP (1.500 vs 1.865). 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.