Roberto Duran vs. Arnie Portocarrero — Career Comparison

Arnie Portocarrero built a career as a starting pitcher and Roberto Duran as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Arnie Portocarrero posted stronger surface numbers — ERA 4.32 and WHIP 1.354 compared to 6.58 and 1.846 for Roberto Duran. By the career numbers, Arnie Portocarrero had the better of this cross-role comparison — though era context would sharpen the verdict.