Hot off my review of FX's freshman series Terriers, the network has canceled the show due to low ratings (and obviously a higher budget than they can financially be responsible for).
There is a lot of finger pointing at FX for a terrible marketing campaign. While I do agree that the marketing of the show was horrific, it ultimately didn't draw the numbers it needed to. Good shows fall by the wayside, it sucks. FX has a ton of great shows on the air and it is hard to blame them for letting this one slip.