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1/10/2014 5:47 P.M. ET

Giants Minor Leaguer Guzman Suspended

The Office of the Commissioner of Baseball announced today that San Francisco Giants Minor League infielder Marco Guzman has received a 50-game suspension without pay after testing positive for metabolites of Nandrolone, a performance-enhancing substance in violation of the Minor League Drug Prevention and Treatment Program.

The suspension of Guzman, who is currently on the roster of the Dominican Summer League Giants, will be effective at the start of the regular season.

This story was not subject to the approval of Major League Baseball or its clubs.