Joe Callahan vs. Christian Roa — Career Comparison

Joe Callahan built a career as a starting pitcher and Christian Roa as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Christian Roa posted stronger surface numbers — ERA 0 and WHIP 1.333 compared to 6.4 and 1.639 for Joe Callahan. By the career numbers, Christian Roa had the better of this cross-role comparison — though era context would sharpen the verdict.