Reports: Yankees first baseman Mark Teixeira to announce retirement

Mark Teixeira, who played a crucial role in the New York Yankees' 27th and most recent World Series title, will announce his retirement effective at the end of this season in a Friday news conference, according to multiple news reports.

Teixeira, 36, is in the final year of an eight-year, $180 million contract that he signed during a transformative off-season with the Yankees.

The switch-hitting first baseman went on to lead the American League in home runs and RBI in the 2009 season, which culminated in the Yankees' only World Series title this century. He finished second in MVP voting that year, but has been on a downward plane, his contract emblematic of the Yankees' deterioration into a collection of high-priced, declining players.

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