John Lackey vs. Melvin Mercedes — Career Comparison

John Lackey built a career as a starting pitcher and Melvin Mercedes as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Melvin Mercedes posted stronger surface numbers — ERA 0 and WHIP 0.000 compared to 3.92 and 1.306 for John Lackey. By the career numbers, Melvin Mercedes had the better of this cross-role comparison — though era context would sharpen the verdict.