Mitch Keller has pitched most of the season for the Pittsburgh Pirates High-A affiliate. He had a rough start to the year, but has settled down nicely since returning from an early season injury. Sean McCool, the Altoona Curve writer for Pirates Prospects, has reported that Keller is being promoted to Double-A.
Keller will join the Curve, who were also joined by former first round pick Cole Tucker just a few weeks ago. Both Keller and Tucker were drafted out of high school in the 2014 draft, and, respectively, were the Pittsburgh Pirates first and second round picks that year.