John O'Donnell vs. Jon Singleton — Career Comparison

On the career numbers, Jon Singleton posted the stronger offensive profile against John O'Donnell. Jon Singleton posted stronger numbers in OPS (.645 vs .500) and on-base percentage (.300 vs .250). John O'Donnell had the advantage in batting average (.250 vs .197). By the career numbers, Jon Singleton had the stronger overall case — though those totals don't account for the eras and run environments each player worked in.