Sean O'Sullivan vs. Jackson Tetreault — Career Comparison

Looking at the career totals, Sean O'Sullivan and Jackson Tetreault are fairly close on the surface numbers. Jackson Tetreault had the edge in ERA (5.14 vs 6.01). By the career numbers, Jackson Tetreault 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.