Kenley Jansen vs. Juan Peña — Career Comparison

Juan Peña 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. Juan Peña posted stronger surface numbers — ERA 0.69 and WHIP 0.923 compared to 2.57 and 0.983 for Kenley Jansen. By the career numbers, Juan Peña had the better of this cross-role comparison — though era context would sharpen the verdict.