Stephenson will start Thursday's series finale against the Phillies, the Cincinnati Enquirer's Zach Buchanan reports.
The Reds will send Stephenson down to the minors to ripen further, but he should be up again later this season when another need arises. This is a perfect opportunity for Stephenson to get a taste of the big leagues without completely throwing him to the wolves, as the Phillies should have one of the worst lineups in baseball this year. Everyone knows Stephenson has the pure stuff to succeed and even thrive in the majors, but his control will be what makes or breaks his potential future as a high-end starter.