John Lannan vs. John Roper — Career Comparison

On the career pitching numbers, John Lannan posted a stronger line than John Roper. John Lannan posted stronger numbers in ERA (4.18 vs 5.35) and WHIP (1.454 vs 1.511). By the career numbers, John Lannan 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.