Duff has tallied a walk 26 times while being called out on strikes on 0 attempts. His OBP is .372 and he has a lifetime OPS of .489. He has accounted for 90 runs in addition to having earned 69 runs batted in. He has hit it out of the park 4 times, with 213 total bases and a .117 slugging percentage. Over the course of the 486 official at-bats in his MLB career, Duff has hit .333 in addition to 162 base knocks.