But apparently he's not ready yet, according to Fred Nelson:
He has work to do to get himself ready to go to the big leagues. He’s not there yet. Sometime shortly if there’s a need at the big league level, he could certainly be a candidate who could go to the big leagues. He’s still working on location and command and his secondary stuff and how to pitch to experienced hitters.”
That makes total sense considering that, in 19IP, he's allowed 15H/0ER, 21K:6BB, and opponents are hitting .221 against him.
Or if you take into account his last ten games (five at home, five on the road), where he has allowed 6H/0ER, 13K:4BB in 11IP, with a .162 BAA.