Roland de la Maza vs. William Parson — Career Comparison

Looking at the career totals, Roland de la Maza and William Parson are fairly close on the surface numbers. Roland de la Maza posted stronger numbers in ERA (4.5 vs 4.92) and WHIP (1.000 vs 1.856). William Parson had the advantage in home runs allowed (0.6 per nine innings vs 4.5). By the career numbers, Roland de la Maza 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.