Buster Posey retires: Giants catcher's singular career, legacy - Sports Illustrated
Giants legend Buster Posey officially retires, cites family, other reasons
Buster Posey announces retirement
Citing the Pain of a Demanding Job, Buster Posey Retires at 34 - The New York Times
Giants' Buster Posey to retire, per report - MLB Daily Dish
Buster Posey announces retirement
Buster Posey Joins San Francisco Giants Ownership Group - The New York Times
Buster Posey: San Francisco Giants' 7-time All-Star catcher to retire
Buster Posey plans to retire, ending his storied Giants career