Michael Grove vs. Junior Guerra — Career Comparison

On the career pitching numbers, Junior Guerra posted a stronger line than Michael Grove. Junior Guerra posted stronger numbers in ERA (4.06 vs 5.48) and home runs allowed (1.17 per nine innings vs 1.45). By the career numbers, Junior Guerra 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.