San Francisco Giants' Buster Posey announces retirement
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San Francisco Giants' Buster Posey retires, citing family
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Buster Posey announces retirement
Report: Giants' Buster Posey will announce retirement - NBC Sports
Three-time champ Buster Posey becomes first former player to join
Buster Posey plans to retire, ending his storied Giants career
Major League Baseball links - Buster Posey retires, Tigers add
Retired Giants catcher Buster Posey goes back to school to
Giants catcher Buster Posey to retire from MLB