Magneuris Sierra (born April 7, 1996) is a Dominican professional baseball outfielder who is currently a free agent. He has previously played in MLB for the St. Louis Cardinals, Miami Marlins and Los Angeles Angels. The Cardinals signed him as an international free agent in 2012 and he made his major league debut on May 7, 2017. In 2014, he was the Cardinals Minor League Player of the Year after batting .386 with a .939 on-base plus slugging percentage (OPS).