Philadelphia Phillies infielder Freddy Galvis was suspended for 50 games by Major League Baseball on Tuesday after testing positive for a metabolite of Clostebol, a performance-enhancing substance in violation of Major League Baseball's Joint Drug Prevention and Treatment Program. The suspension takes effect immediately. "The Phillies continue to believe in and endorse Major League Baseball's drug policy," the Phillies said in a statement. "We also support Freddy Galvis in his determination to put this matter behind him and we look forward to his return as a productive member of the Phillies as soon as possible." Galvis is batting .226 with three homers this season. He has been the Phillies starting second baseman in the absence of injured Chase Utley, but Galvis has not played since June 6 because of a back injury.