George O'Donnell vs. Luis Vizcaino — Career Comparison

George O'Donnell built a career as a starting pitcher and Luis Vizcaino as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Luis Vizcaino posted stronger surface numbers — ERA 4.33 and WHIP 1.407 compared to 4.53 and 1.443 for George O'Donnell. By the career numbers, Luis Vizcaino had the better of this cross-role comparison — though era context would sharpen the verdict.