NBA players have announced what team they're signing with on Twitter , they've inadvertently announced coach firings on Twitter , they've sent well-wishes on Twitter , and they've cost themselves thousands of dollars on Twitter . We've got a new one to add to the list. San Antonio Spurs guard T.J. Ford, tired of working his way back from frightening neck injuries, has announced his retirement on Twitter. Soon after the Spurs released a statement telling fans that Ford would be out for the season , Ford took to his Twitter account to relay the news: More...