Buster Posey retirement: Giants catcher to announce he will retire from MLB on Thursday - DraftKings Network
Giants' Buster Posey will announce retirement: report
SF Giants' Buster Posey set to announce retirement on Thursday, per report – Daily Democrat
MLB on FOX - According to Andrew Baggarly, San Francisco Giants C Buster Posey will announce his retirement tomorrow.
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Giants catcher Buster Posey will announce retirement - Los Angeles Times
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SF Giants News: Buster Posey to announce his retirement tomorrow - McCovey Chronicles
LIVE: Buster Posey announces retirement at Oracle Park