David Aardsma vs. William Bell — Career Comparison

William Bell built a career as a starting pitcher and David Aardsma as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. William Bell posted stronger surface numbers — ERA 1.85 and WHIP 1.353 compared to 4.27 and 1.487 for David Aardsma. By the career numbers, William Bell had the better of this cross-role comparison — though era context would sharpen the verdict.