Mike Duvall vs. John Slappey — Career Comparison

John Slappey built a career as a starting pitcher and Mike Duvall as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Mike Duvall posted stronger surface numbers — ERA 4.76 and WHIP 1.863 compared to 7.11 and 3.000 for John Slappey. By the career numbers, Mike Duvall had the better of this cross-role comparison — though era context would sharpen the verdict.