The Mets are close to acquiring second baseman Luis Castillo from the Twins for two minor leaguers, according to major-league sources. Mets Class AA catcher Drew Butera and Class A outfielder Dustin Martin are among the players the Twins are considering. The deal is expected to be finalized after a review of the medical records of the players involved. Castillo would replace Jose Valentin, who recently suffered a season-ending broken shin when he fouled a pitch off his leg.