Bill Hopper vs. Marc Pisciotta — Career Comparison

On the career pitching numbers, Bill Hopper posted a stronger line than Marc Pisciotta. Bill Hopper posted stronger numbers in WHIP (1.558 vs 1.661) and home runs allowed (0.3 per nine innings vs 0.67). By the career numbers, Bill Hopper 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.