The Yankees have begun trade talks involving Randy Johnson with several teams, including the Arizona Diamondbacks, although it is too early to tell whether the discussions will lead to a deal. Talks were confirmed Monday by a baseball official who had knowledge of them and spoke on condition of anonymity because they are in the preliminary stage. The Yankees' discussions with the Diamondbacks, Johnson's former club, were first reported by the New York Post and The Star-Ledger of New Jersey. Alan Nero, one of Johnson's agents, said Monday he was informed of trade talks by Yankees general manager Brian Cashman. ?I just had one conversation with Brian, and that's it. As far we know, there's nothing going on significant enough for us to become a part of it,? Nero said. ?I think Brian is just doing his job.?