Don Brennan vs. Matt Foster — Career Comparison

Looking at the career totals, Don Brennan and Matt Foster are fairly close on the surface numbers. Don Brennan posted stronger numbers in ERA (4.19 vs 4.3) and home runs allowed (0.32 per nine innings vs 1.36). Matt Foster had the advantage in WHIP (1.274 vs 1.552). 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.