Jack Armstrong vs. Don Brennan — Career Comparison

Jack Armstrong built a career as a starting pitcher and Don Brennan as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Don Brennan posted stronger surface numbers — ERA 4.19 and WHIP 1.552 compared to 4.58 and 1.458 for Jack Armstrong. By the career numbers, Don Brennan had the better of this cross-role comparison — though era context would sharpen the verdict.