Dan Jennings vs. Thyago Vieira — Career Comparison

On the career pitching numbers, Dan Jennings posted a stronger line than Thyago Vieira. Dan Jennings posted stronger numbers in ERA (3.1 vs 5.81) and WHIP (1.486 vs 1.665). By the career numbers, Dan Jennings 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.