David Hess vs. Kenley Jansen — Career Comparison

David Hess 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 6.25 and 1.545 for David Hess. By the career numbers, Kenley Jansen had the better of this cross-role comparison — though era context would sharpen the verdict.