Zach McClellan vs. Mike O'Connor — Career Comparison

Mike O'Connor built a career as a starting pitcher and Zach McClellan as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Mike O'Connor posted stronger surface numbers — ERA 5.3 and WHIP 1.459 compared to 5.79 and 1.929 for Zach McClellan. By the career numbers, Mike O'Connor had the better of this cross-role comparison — though era context would sharpen the verdict.