Ken Johnson vs. Roberto Rivera — Career Comparison

Ken Johnson built a career as a starting pitcher and Roberto Rivera as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Ken Johnson posted stronger surface numbers — ERA 3.46 and WHIP 1.231 compared to 4.5 and 1.583 for Roberto Rivera. By the career numbers, Ken Johnson had the better of this cross-role comparison — though era context would sharpen the verdict.