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Yankees captain Derek Jeter, all-star shortstop and fan favorite, announced his upcoming retirement Wednesday in a letter posted on his Facebook page.

"I realized that some of the things that always came easily to me and were always fun had started to become a struggle," Jeter wrote. "I know it in my heart. The 2014 season will be my last year playing professional baseball."

Read the letter in its entirety below, or by visiting Facebook. Find the full story on NBC Sports.

Derek Jeter posted this letter to Facebook on Feb. 12, 2014.