Kurt Birkins vs. Mitch Spence — Career Comparison

Mitch Spence built a career as a starting pitcher and Kurt Birkins as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Mitch Spence posted stronger surface numbers — ERA 4.77 and WHIP 1.411 compared to 5.85 and 1.553 for Kurt Birkins. By the career numbers, Mitch Spence had the better of this cross-role comparison — though era context would sharpen the verdict.