George O'Donnell vs. Jesen Therrien — Career Comparison

George O'Donnell built a career as a starting pitcher and Jesen Therrien as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. George O'Donnell posted stronger surface numbers — ERA 4.53 and WHIP 1.443 compared to 8.35 and 1.691 for Jesen Therrien. By the career numbers, George O'Donnell had the better of this cross-role comparison — though era context would sharpen the verdict.