MLB Daily Dish is reporting that the Houston Astros and New York Mets are both showing interest in Daisuke Matsuzaka. According to the article Dice K isn't sure if he will pitch in the majors this year or return to Japan, indicating he would prefer Japan over a minor league assignment. Both clubs are reported to be looking to sign Matsuzaka to a minor league deal with an invite to major league spring training camp.
UPDATE: Brian Smith says the Astros aren't involved in any "active discussions" regarding Dice-K.