Duffy has drawn a free base 176 times while striking out on 438 plate appearances. His on-base percentage is .335 and he holds a career OPS of .704. He has recorded 272 runs and has 231 runs batted in. He has hit the long ball 31 times, in addition to having 859 total bases and also a .369 slugging %. Over the course of the 2,331 at-bats in his professional career, Duffy has hit .277 in addition to 646 base hits.
