Buster Posey retires after 12 seasons with Giants, '12 slam vs. Reds
Giants' Buster Posey to announce retirement Thursday: Sources - The Athletic
Buster Posey opts out of 2020 season - Lone Star Ball
San Francisco Giants catcher Buster Posey's expected retirement announcement shocks fans - ABC7 San Francisco
Giants' Buster Posey will announce retirement Thursday: report
What Buster Posey's absence will mean for the Giants (and is Joey Bart ready?) – Monterey Herald
MLB players who are opting out of the 2020 season - ESPN
Buster Posey considers opting out of San Francisco Giants season - McCovey Chronicles
LIVE: Buster Posey announces retirement at Oracle Park
SF Giants: With Buster Posey retired, is it Joey Bart's time for an extended look? – Daily Democrat
Buster Posey: Giants catcher's Hall of Fame case is strong but flawed
Giants evaluating replacements for Buster Posey