Buster Posey returns to college after 15 years of playing ball - Sactown Sports
Citing the Pain of a Demanding Job, Buster Posey Retires at 34 - The New York Times
MLB: Giants star Buster Posey retires from baseball
SF Giants legend Buster Posey moving back to Bay Area - Sports Illustrated San Francisco Giants News, Analysis and More
LIVE: Buster Posey announces retirement at Oracle Park
Report - San Francisco Giants' Buster Posey plans to retire Thursday - ESPN
Buster Posey - MLB News, Rumors, & Updates
Giants' Buster Posey reportedly set to retire Thursday
Nevius: Posey's surprise retirement is understated, typical Buster