Mark Mercer vs. Donald Troy — Career Comparison

Donald Troy built a career as a starting pitcher and Mark Mercer as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Donald Troy posted stronger surface numbers — ERA 3.1 and WHIP 1.264 compared to 4.7 and 1.826 for Mark Mercer. By the career numbers, Donald Troy had the better of this cross-role comparison — though era context would sharpen the verdict.