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05/07/2012 4:23 PM EST

San Francisco's Mota suspended

The Office of the Commissioner of Baseball announced today that San Francisco Giants pitcher Guillermo Mota has received a 100-game suspension after testing positive for Clenbuterol, a performance-enhancing substance in violation of Major League Baseball's Joint Drug Prevention and Treatment Program.

The suspension of Mota, who received a 50-game suspension for a performance-enhancing substance violation on November 1, 2006, is effective immediately.

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