i think he would make an awesome closer, but they gonna use him as a starter.
he can be awesome in starter position as well but there is a good chance he will get injuired. he uses a lot of strain, especially in fastball pitches... this is ideal for closers because they pitch only 1 inning.
so if they use him as a starter i think he will have a good start, then get injured or get tired after half a season or so.
if he starts really hot in the first 7 to 10 games, then i would trade him for someone big.