Buster Posey Retires — Is He a Hall of Famer? – The Fordham Ram
Buster Posey's reaction to Game 162 hinted at retirement to Sergio
Buster Posey skipping MLB season for his babies is a huge sacrifice
Giants' Buster Posey revitalized by 2020 opt-out
Buster Posey announces retirement
Buster Posey considers opting out of San Francisco Giants season
Buster Posey officially opts out of the 2020 MLB season
Giants' Buster Posey to retire, per report - MLB Daily Dish
Giants' Buster Posey 'Definitely' Considering Opting Out of 2020