Lefty Grove vs. Casey Janssen — Career Comparison

Lefty Grove 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. Lefty Grove posted stronger surface numbers — ERA 3.06 and WHIP 1.278 compared to 3.63 and 1.238 for Casey Janssen. By the career numbers, Lefty Grove had the better of this cross-role comparison — though era context would sharpen the verdict.