Pirates Prospects has learned that the Pittsburgh Pirates have signed left-handed pitcher Estalin Ortiz from the Dominican Republic. He's 19 years old and stands 6'4", 220 pounds. Ortiz reportedly agreed to an offer with the Philadelphia Phillies in early December, but he did not sign. He had also been scouted by numerous other teams late last year who were interested in signing him, but wouldn't match his bonus demand, which was higher at the time.
I was able to find two videos of him, one of them a brief one with a scouting report from that day. The first is a YouTube video from October 2016 when he pitched in a tournament in Florida.