David Hernandez vs. Mike O'Connor — Career Comparison

Mike O'Connor built a career as a starting pitcher and David Hernandez as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. David Hernandez posted stronger surface numbers — ERA 4.12 and WHIP 1.335 compared to 5.3 and 1.459 for Mike O'Connor. By the career numbers, David Hernandez had the better of this cross-role comparison — though era context would sharpen the verdict.