he doesn't need to be released, DL him for now.
Or maybe DFA him with the plan of him clearing waivers and going to Gwinnett to try to regain confidence, it'd be surprising if someone claimed him even if he's a living breathing left hander because while his metrics are better (because some of this is simply bad luck, while major league hitters punish meatballs, everything that is a meatball from him is getting hammered now), he's been so bad, his command has been so bad, and he's 31 years old, so it's doubtful anyone wants to claim him and take a shot.