John Harper vs. Garrett Whitlock — Career Comparison

John Harper built a career as a starting pitcher and Garrett Whitlock as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Garrett Whitlock posted stronger surface numbers — ERA 3.13 and WHIP 1.145 compared to 4.67 and 1.421 for John Harper. By the career numbers, Garrett Whitlock had the better of this cross-role comparison — though era context would sharpen the verdict.