We'll round up today's minor moves here: The Red Sox have released reliever Shunsuke Watanabe, who was in camp on a minor league invite, tweets WEEI.com's Alex Speier. The 37-year-old has never pitched in the majors, spending his entire career in Japan with the Chiba Lotte Marines. First baseman Rich Poythress has been released by the Mariners, Ryan Divish of the Seattle Times reports (via Twitter). A lifetime member of the Mariners organization, the 26-year-old has never received a big league callup. The Nationals signed lefty Aaron Laffey to a minor league deal, tweets Chris Cotillo of MLBDailyDish. Laffey was...

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