Lefty Atkinson vs. Jack O'Brien — Career Comparison

On the career numbers, Jack O'Brien posted the stronger offensive profile against Lefty Atkinson. Jack O'Brien posted stronger numbers in OPS (.700 vs .000) and on-base percentage (.331 vs .000). By the career numbers, Jack O'Brien had the stronger overall case — though those totals don't account for the eras and run environments each player worked in.