It's now or never for the New York Yankees. The Yankees open a five-game series at Fenway Park on Friday with their alter egos in the American League East, the Boston Red Sox. Just 1 1/2 games will separate the two teams when that series begins. Since the All-Star break, the Sox have slipped considerably, going 16-17 with problems surfacing with their starting pitching, relief corps and hitting (with the exception of David Ortiz and Manny Ramirez). The Yankees, meanwhile, seem to have righted themselves after a long year of struggles with injuries and under-producing pitchers such as Randy Johnson....