Zach Jackson vs. Phil Seibel — Career Comparison

Zach Jackson built a career as a starting pitcher and Phil Seibel as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Phil Seibel posted stronger surface numbers — ERA 0 and WHIP 1.364 compared to 5.81 and 1.566 for Zach Jackson. By the career numbers, Phil Seibel had the better of this cross-role comparison — though era context would sharpen the verdict.