Kervin Castro vs. Charlie Sproull — Career Comparison

Charlie Sproull built a career as a starting pitcher and Kervin Castro as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Kervin Castro posted stronger surface numbers — ERA 4.91 and WHIP 1.558 compared to 5.94 and 1.826 for Charlie Sproull. By the career numbers, Kervin Castro had the better of this cross-role comparison — though era context would sharpen the verdict.