Via the Dominican Prospect League’s Twitter feed, the Yankees have signed 19-year-old righthander Erik Olivo for $300,000. He apparently works at 90-94 mph with his fastball and checks in at 6-foot-3 and 185 lbs, meaning there’s plenty of room for growth. In 11 relief appearances for Tainos Del Norte of the DPL, Olivo’s struck out 23 and allowed just ten hits in 22 IP. The bad news? How about 18 walks. So he’s got some stuff to work on. They all do.