I’d use him as a long reliever. His vL isn’t actually that terrible; I’ve had lots of guys with splits in the upper 50s do well if their other numbers were good. The control is a concern. And this may be a personal thing, but I’ve been burned by 3-pitch guys in the past, and generally I don’t like to use them as starters.
I think your guy could be a perfectly acceptable long reliever, but I wouldn’t want him in my rotation.