Daisuke Matsuzaka vs. John Valentine — Career Comparison

Daisuke Matsuzaka built a career as a starting pitcher and John Valentine as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. John Valentine posted stronger surface numbers — ERA 3.53 and WHIP 1.441 compared to 4.45 and 1.413 for Daisuke Matsuzaka. By the career numbers, John Valentine had the better of this cross-role comparison — though era context would sharpen the verdict.