Don Brennan vs. Charlie Kerfeld — Career Comparison

Looking at the career totals, Don Brennan and Charlie Kerfeld are fairly close on the surface numbers. Don Brennan had the edge in home runs allowed (0.32 per nine innings vs 0.54). 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.