Bulpett reports: (http://www.bostonherald.com/sports/basketball/celtics/view.bg?articleid=1106371 srvc=rss) Unless someone steps up with the magic numbers for James Posey, it appears the process to sign the free agent will drag out for a while. The Celtics are still very much interested in retaining the top reserve, but they may need to be concerned about another club offering the contract Posey is requesting, said to be at least four years at the mid-level excep...