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Impossible to replace, Cooperstown-bound: What Bochy, Kapler & Co. say about Buster Posey's retirement
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SF Giants News: Buster Posey to announce his retirement tomorrow - McCovey Chronicles
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Buster Posey: Breaking News, Rumors & Highlights
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Source: Giants' Buster Posey to announce MLB retirement in stunning move – NBC Sports Bay Area & California
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Buster Posey retires after 12 seasons
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Surprise retirements from MLB players
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Buster Posey's grand slam sends SF Giants to 10-inning win
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Surprise retirements from MLB players
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Why Buster Posey's Giants retirement shouldn't be total surprise – NBC Sports Bay Area & California
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Buster Posey retires after 12 seasons
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Buster Posey plans to retire, ending his storied Giants career