Houck suffers from what a lot of hulking right handed pitchers with machine guns for arms suffer from. He lacks a reliable, controllable pitch that moves away from a lefty. The righties who can handle lefties best have circle changeups or have really solid 2 seamers which move away from the lefties. Also, there were issues about stamina and health with Houck. My bet is Bloom starts him off next year as a bulk guy to see what they have in him after a "hopefully" normal spring training