San Francisco Giants announce catcher Buster Posey has opted out of 2020 season - ABC7 San Francisco
SF Giants' Posey opts out, citing twins' health as reason, Sports
2021 Topps Gallery Missing Foil Buster Posey #179.mif
SFGiants on X: OFFICIAL: Buster Posey has opted out of the 2020 season. #SFGiants / X
Muntz Named to Buster Posey Award Watch List - Wake Forest University Athletics
Tracking MLB Opt-Outs - NBC Sports
Dodgers pitcher David Price opts out of 2020 MLB season - Los Angeles Times
AP Source: Giants C Buster Posey will announce retirement
Lorenzo Cain is opting out of 2020 season - NBC Sports
Longtime Giants catcher Buster Posey announces retirement after 12 seasons
Buster Posey opts out of 2020 season after adoption of premature twin daughters – KNBR
Why SF Giants believe in Joey Bart to start post-Buster Posey era
Buster Posey's Hall of Fame resume heavy on playoff success, light on traditional statistics
Andrelton Simmons declines to address opt-out at end of Angels' 2020 season – Orange County Register
Giants' Buster Posey elects not to play in 2020