Mark Mercer vs. Tom Underwood — Career Comparison

Tom Underwood 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. Tom Underwood posted stronger surface numbers — ERA 3.89 and WHIP 1.421 compared to 4.7 and 1.826 for Mark Mercer. By the career numbers, Tom Underwood had the better of this cross-role comparison — though era context would sharpen the verdict.