David Aardsma vs. Unknown Blackburn — Career Comparison

Unknown Blackburn 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. Unknown Blackburn posted stronger surface numbers — ERA 0.9 and WHIP 1.000 compared to 4.27 and 1.487 for David Aardsma. By the career numbers, Unknown Blackburn had the better of this cross-role comparison — though era context would sharpen the verdict.