Mike Armstrong vs. Cam Booser — Career Comparison

On the career pitching numbers, Mike Armstrong posted a stronger line than Cam Booser. Mike Armstrong posted stronger numbers in ERA (4.1 vs 4.28) and home runs allowed (1.12 per nine innings vs 1.59). By the career numbers, Mike Armstrong 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.