Carlos Guevara vs. Roberto Rivera — Career Comparison

On the career pitching numbers, Roberto Rivera posted a stronger line than Carlos Guevara. Roberto Rivera posted stronger numbers in ERA (4.5 vs 5.84) and WHIP (1.583 vs 1.946). By the career numbers, Roberto Rivera 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.