Adrian Nieto, a switch-hitting catcher whom the Nationals took in the fifth round of the 2008 draft, has been suspended 50 games after testing positive for a performance-enhancing substance, according to a Major League Baseball release.
The release said Nieto tested positive for Oxandrolone, a drug primarily used to stimulate weight gain, and metabolite, which is a performance-enhancing substance. His suspension will start at the beginning of the 2011 season.
Nieto, a 20-year-old who left Cuba for the United States, has struggled offensively in the minors. He hit .195 at Single-A Hagerstown last season, posting just two homers in 60 games there.