Kenley Jansen vs. Ciscero Warren — Career Comparison

Ciscero Warren built a career as a starting pitcher and Kenley Jansen as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Kenley Jansen posted stronger surface numbers — ERA 2.57 and WHIP 0.983 compared to 5 and 1.600 for Ciscero Warren. By the career numbers, Kenley Jansen had the better of this cross-role comparison — though era context would sharpen the verdict.