John Donnelly vs. Jon Singleton — Career Comparison

On the career numbers, Jon Singleton posted the stronger offensive profile against John Donnelly. Jon Singleton posted stronger numbers in OPS (.645 vs .520) and on-base percentage (.300 vs .256). John Donnelly had the advantage in batting average (.252 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.