AP Source: Giants C Buster Posey will announce retirement - The San Diego Union-Tribune
Why is Buster Posey retiring? Giants MVP catcher reportedly calling it a career
MLB Trade Rumors and News: Buster Posey retires during a busy day for baseball transactions - MLB Daily Dish
Buster Posey Announces Retirement - MLB Trade Rumors
Buster Posey retirement: Giants catcher's career ends fittingly - Sports Illustrated
AP Source: Giants C Buster Posey will announce retirement
Buster Posey announces retirement
FSU baseball to retire Giants great Buster Posey's jersey
Major League Baseball links - Buster Posey retires, Tigers add Barnhart - Red Reporter
Buster Posey's retirement felt by SF Giants, Bay Area sports community
Giants legend Buster Posey officially retires, cites family, other reasons