Dave Heaverlo vs. Mel Nelson — Career Comparison

On the career pitching numbers, Dave Heaverlo posted a stronger line than Mel Nelson. Dave Heaverlo posted stronger numbers in ERA (3.41 vs 4.4) and home runs allowed (0.69 per nine innings vs 0.98). 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.