Arturo Lopez vs. Jon Matlack — Career Comparison

Jon Matlack built a career as a starting pitcher and Arturo Lopez as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jon Matlack posted stronger surface numbers — ERA 3.18 and WHIP 1.262 compared to 19.29 and 4.286 for Arturo Lopez. By the career numbers, Jon Matlack had the better of this cross-role comparison — though era context would sharpen the verdict.