Major League Baseball identified 10 players who had violated terms of the minor league drug prevention and treatment program. All 10 received suspensions for testing positive for a performance-enhancing substance.

The Dodgers' Prentice Redman received a 100-game suspension after testing positive for an amphetamine. It's his second violation in as many months, thus the hefty penalty. The Triple-A Albuquerque outfielder is currently serving a 50-game suspension and will begin his 100-game ban upon his return. All told, Redman will miss more than a year of the Pacific Coast League's 144-games season.

The remaining suspensions for performance enhancers run 50 games each:

• Nationals shortstop Pedro Lopez tested positive for Formestane. He batted .216/.293/.304 in 148 at-bats for Triple-A Syracuse after signing with the organization as a free agent in January.

• Tigers third baseman Cesar Nicolas tested positive for an amphetamine. He batted .279/.375/.443 with seven home runs in 244 at-bats for Double-A Erie. He spent the ’09 season playing independent ball before inking a deal with the Tigers in January.

• Free agent first baseman Jorge Castillo tested positive for Phenmetrazine. The White Sox released him on May 1 after he batted .244/.239/.289 in 45 at-bats for low Class A Kannapolis. He'll sit for 50 games if he signs with another organization.

Six other players incurred penalties while playing in Latin American rookie leagues:

• Pirates righthander Jose Acosta tested positive for metabolites of Stanozolol. He appeared in one Venezuelan Summer League game.

• A trio of Dominican Summer League Brewers netted 50-game bans: third baseman Allixon Cequea and outfielder Erickson Salaya both tested positive for metabolites of Nandrolone, while righthander Leonard Lorenzo tested positive for a metabolite of Boldenone. 

• Tigers DSL righthander Jose Valdez tested positive for a metabolite of Boldenone.

• Athletics DSL righthander Leonel Benzant tested positive for metabolites of Stanozolol.