Magneuris Sierra (born April 7, 1996) is a Dominican professional baseball outfielder in the Los Angeles Angels organization with the Salt Lake Bees. He has played in Major League Baseball (MLB) for the St. Louis Cardinals and Miami Marlins. 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).