Buster Posey works out arm in offseason firing dirty diapers
Buster Posey opts out of 2020 season - MLB Daily Dish
Full List Of MLB Players Opting Out Of 2020 Season — College Baseball, MLB Draft, Prospects - Baseball America
LIVE: Buster Posey announces retirement at Oracle Park
Giants star Buster Posey sitting out the 2020 season – Santa Cruz Sentinel
Price, Posey, MLBers who opted out for virus excited for '21
Surprise retirements from MLB players
Buster Posey is back behind plate after opting out in 2020, Taiwan News
2021 Will Be Buster Posey's Final Season With The SF Giants
BCB After Dark: Giants Buster Posey retires Hall of Fame - Bleed Cubbie Blue
Buster Posey opts out of playing for San Francisco Giants in coronavirus-shortened MLB season - CBS News