ehh baez has like an 8% walk rate for his career vs lefties, which is pretty respectable, and around a .340 OBP including his awful 2014. and, for whatever it's worth, almora has walked like 8% of the time in his limited time vs lefties (with a ridiculous .315/.367/.589 line) i don't have any issue with it vs a lefty also, maybe it's not approach/discipline and it's just a lesser ability to read same handed pitching