Casey Janssen vs. David Manning — Career Comparison

David Manning built a career as a starting pitcher and Casey Janssen as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Casey Janssen posted stronger surface numbers — ERA 3.63 and WHIP 1.238 compared to 16.2 and 2.850 for David Manning. By the career numbers, Casey Janssen had the better of this cross-role comparison — though era context would sharpen the verdict.