Mike Bolsinger vs. Don Ferrarese — Career Comparison

On the career pitching numbers, Don Ferrarese posted a stronger line than Mike Bolsinger. Don Ferrarese posted stronger numbers in ERA (4 vs 4.92) and home runs allowed (0.69 per nine innings vs 1.33). By the career numbers, Don Ferrarese 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.