John Flannery vs. Don Heffner — Career Comparison

On the career numbers, Don Heffner posted the stronger offensive profile against John Flannery. Don Heffner posted stronger numbers in OPS (.620 vs .333) and slugging (.303 vs .000). John Flannery had the advantage in on-base percentage (.333 vs .317). By the career numbers, Don Heffner had the stronger overall case — though those totals don't account for the eras and run environments each player worked in.