The suspended Dominican Summer League players included Los Angeles Dodgers shortstop Rafael Aybar, Florida Marlins pitcher Alfredo Buret, Baltimore Orioles pitcher Julio Sanchez and Minnesota Twins outfielder Eliel Sierra, all penalized after testing positive for a metabolite of Boldenone.
St. Louis Cardinals catcher Juan Castillo, assigned to the rookie league Gulf Coast League, tested positive for metabolites of Stanozolol.
A total of 34 minor leaguers have received 50-game bans since July 25, including 26 from the Dominican Summer League and four from the Venezuelan Summer League.
Three more minor leaguers get drug suspensions
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