Over the course of the 1,768 official at-bats in his professional career, Mejias has compiled an average at the plate of .254 in addition to having 449 hits. His OBP comes in at .294 and he is the owner of a lifetime OPS of .346. He has amassed 212 runs and has 202 RBIs. Mejias has recorded a free base 89 times while being called out on strikes on 238 tries. He has homered 54 times, with 692 total bases and also a .052 slugging percentage.