The Pirates traded right-hander Gerrit Cole to the Astros on Saturday for right-handed pitchers Joe Musgrove and Michael Feliz, as well as prospects Colin Moran and Jason Martin.
"Trading Gerrit Cole was not an easy decision," said Pirates general manager Neal Huntington in a statement. "We are very appreciative for what Gerrit has done for our team and organization, especially his important role on the 2013-15 playoff teams.
"Acquiring these four quality young players, three of whom we project to be an important part of our 2018 team, with many years of potential contribution, is an important step for us as we work toward bringing playoff baseball back to our fans.