Charles Joseph Riefenhauser (born January 30, 1990) is an American professional baseball pitcher who is currently a free agent. He has played in Major League Baseball (MLB) for the Tampa Bay Rays.\n', '

Riefenhauser was drafted in the 20th round of the 2010 First-Year Player Draft out of Chipola Junior College. That year he played for the Princeton Rays and the Bowling Green Hot Rods, and recorded a combined ERA of 2.25 with only 28.0 IP. In the 2011 season he played for both the Hot Rods and the Charlotte Stone Crabs with an ERA of 2.80 and 138.1 IP.\n', '

Riefenhauser represented the Rays at the 2013 All-Star Futures Game. He was added to the Rays 40-man roster on November 20, 2013. He was called up on April 19, 2014 to make his MLB debut, and sent back down on April 21. He was recalled again on September 16, after the Durham Bulls\' post-season ended.\n', '

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