Marty Keough vs. Jack O'Brien — Career Comparison

Looking at the career totals, Marty Keough and Jack O'Brien are closely matched on the surface stats. Jack O'Brien posted stronger numbers in on-base percentage (.331 vs .313) and batting average (.266 vs .242). Marty Keough had the advantage in home run production (43 career HR at a higher rate). 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.