Don Brennan vs. Arnold Leon — Career Comparison

On the career pitching numbers, Don Brennan posted a stronger line than Arnold Leon. Don Brennan posted stronger numbers in ERA (4.19 vs 4.66) and home runs allowed (0.32 per nine innings vs 1.24). By the career numbers, Don Brennan 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.