Dave Heaverlo vs. Mike Thomas — Career Comparison

Looking at the career totals, Dave Heaverlo and Mike Thomas are fairly close on the surface numbers. Mike Thomas posted stronger numbers in ERA (0 vs 3.41) and home runs allowed (0 per nine innings vs 0.69). Dave Heaverlo had the advantage in WHIP (1.492 vs 2.250). By the career numbers, Mike Thomas 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.