Dave Heaverlo vs. Jesen Therrien — Career Comparison

On the career pitching numbers, Dave Heaverlo posted a stronger line than Jesen Therrien. Dave Heaverlo posted stronger numbers in ERA (3.41 vs 8.35) and WHIP (1.492 vs 1.691). By the career numbers, Dave Heaverlo 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.