Bob Ayrault vs. Jason Grilli — Career Comparison

On the career pitching numbers, Bob Ayrault posted a stronger line than Jason Grilli. Bob Ayrault posted stronger numbers in ERA (4.05 vs 4.22) and home runs allowed (0.25 per nine innings vs 1). By the career numbers, Bob Ayrault 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.