Looking for official Buster Posey San Francisco Giants jerseys? Look no further than Fanatics.com, where we have all the color options in the sizes you need for men, women, and kids so you can cheer on the Giants star in style. Add to your Buster Posey collection or treat the big fan in your life with an official jersey or collectible. A true superstar for any position, Posey is arguably the best all-around catcher of his time. He won an MVP in 2012 and helped the Giants win three World Series titles. The best source online for Buster Posey gear is Fanatics.com.