John Foster vs. Colin Selby — Career Comparison

Looking at the career totals, John Foster and Colin Selby are fairly close on the surface numbers. Colin Selby posted stronger numbers in WHIP (1.556 vs 1.615) and home runs allowed (1.2 per nine innings vs 1.63). John Foster had the advantage in ERA (4.9 vs 6.2). By the career numbers, Colin Selby 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.