During the 713 at-bats in his MLB career, Duffy has earned a batting average of .262 with 187 hits. He has gone yard 6 times, in addition to having 251 total bases and a .088 slugging percentage. Duffy has tallied a walk 51 times while being called out on strikes on 148 plate appearances. He has scored 102 runs and also has 52 runs batted in. His on-base rate is .323 and he has a career OPS of .411.