Al Jackson vs. Jason Kershner — Career Comparison

Al Jackson built a career as a starting pitcher and Jason Kershner as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Al Jackson posted stronger surface numbers — ERA 3.98 and WHIP 1.366 compared to 4.22 and 1.326 for Jason Kershner. By the career numbers, Al Jackson had the better of this cross-role comparison — though era context would sharpen the verdict.