Leave him at AAA, unless you're really screwed for a 12th pitcher/long reliever. He'll eat innings and set them on fire. You should easily find a better pitcher in Rule 5 or the bottom of the barrel free agents.
His splits are only just major league average. He's only got one good pitch. His overall rating is only elevated because his Dur/Sta, Groundball, and Velocity are high. And Control that low - hate to say never, but - almost never works in the majors.
Classic quad-A SP.