John Halama vs. José Pereira — Career Comparison

Looking at the career totals, John Halama and José Pereira are fairly close on the surface numbers. José Pereira posted stronger numbers in WHIP (1.327 vs 1.474) and home runs allowed (0 per nine innings vs 1.12). John Halama had the advantage in ERA (4.65 vs 4.78). By the career numbers, José Pereira 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.