Edwin Jackson vs. Jeff Zimmerman — Career Comparison

Edwin Jackson built a career as a starting pitcher and Jeff Zimmerman as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jeff Zimmerman led in run prevention (ERA+ 157 vs 83), walk avoidance (BB%+ 133 vs 83), and strikeout rate (K%+ 134 vs 98). Role difference aside, Jeff Zimmerman holds a clear edge on every meaningful shared measure.