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Aledmys Diaz has gone from All-Star shortstop to minor-leaguer<p>The Cardinals on Wednesday announced that they’ve optioned shortstop Aledmys Diaz to Triple-A and called up 26-year-old Alex Mejia to replace him. To make room for Mejia on the 40-man roster, the Cardinals transferred right-hander Alex …

Read more at CBS Sports: http://www.cbssports.com/mlb/news/the-latest-sign-of-cardinals-struggles-is-the-surprise-demotion-of-an-all-star/