Major League Baseball announced today that it has suspended Brewers minor league righthander Pedro Lambertus for 50 games. He tested positive for metabolites of Boldenone, a performance-enhancing substance.

The 20-year-old, who signed with the Brewers out of the Dominican Republic in 2006, was 0-1, 4.91 with three strikeouts and three walks through 3 2/3 innings, covering three relief appearances, for low Class A Wisconsin.