O’Farrell has an average at the plate of .273 for his baseball career in addition to 517 scored runs and an OPS of .421. He has fanned 408 times and has walked on 547 attempts at the plate, contributing to a .360 on-base percentage. For his career, O’Farrell has drilled 51 balls out of the park while knocking in 549 runs. His slugging percentage sits at .060 and he has totaled 1,590 bases. Over the course of his time in the league, he came to bat 4,745 times and has delivered a hit 1,120 times.