John Foster vs. Sammy Peralta — Career Comparison

Looking at the career totals, John Foster and Sammy Peralta are fairly close on the surface numbers. John Foster posted stronger numbers in ERA (4.9 vs 5.12) and WHIP (1.615 vs 1.774). Sammy Peralta had the advantage in home runs allowed (0.79 per nine innings vs 1.63). By the career numbers, John Foster 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.