Magneuris Sierra (born April 7, 1996) is a Dominican professional baseball outfielder for the St. Louis Cardinals of Major League Baseball (MLB). 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).Sierra signed with the St. Louis Cardinals as an international free agent in 2012. He made his professional debut in 2013 with the Dominican Summer League Cardinals. In 2014, he played for the Gulf Coast Cardinals and was named the Cardinals Minor League Player of the Year after hitting .386 with two home runs and a .939 OPS. Prior to the 2016 season, Baseball America ranked him as the sixth-best prospect in the Cardinals' system. He spent the 2016 season with the Peoria Chiefs of the Class A Midwest League, where he hit .307 with three home runs, 60 runs batted in (RBIs) and 31 stolen bases. The Cardinals added him to their 40-man roster after the season to protect him from being chosen in the Rule 5 Draft. Wikipedia
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