Tommy Doyle vs. Zack Greinke — Career Comparison

Zack Greinke built a career as a starting pitcher and Tommy Doyle as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Zack Greinke posted stronger surface numbers — ERA 3.49 and WHIP 1.178 compared to 8.31 and 1.769 for Tommy Doyle. By the career numbers, Zack Greinke had the better of this cross-role comparison — though era context would sharpen the verdict.