Basketball's Michael Jordan is gone and one can only wonder if Hockey's Wayne Gretzky is far behind? Gretzky, the MVP of last month's NHL all-star game, celebrated his 38th birthday last week and insiders are saying the "great one" may play one more season after this and call it a career. His decision may be based, at least in part, on whether he thinks his New York Rangers' team (which has struggled throughout this year), can make a serious run in the playoffs in the 1999-2000 season.