Jack Leiter vs. Jose Valverde — Career Comparison

Jack Leiter built a career as a starting pitcher and Jose Valverde as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jose Valverde posted stronger surface numbers — ERA 3.27 and WHIP 1.245 compared to 4.8 and 1.361 for Jack Leiter. By the career numbers, Jose Valverde had the better of this cross-role comparison — though era context would sharpen the verdict.