The Boston Celtics have engaged in conversations with the 76ers revolving around Simmons and expressed interest in the 6-foot-11 guard, sources tell The Athletic. Talks have been fluid with no traction as of yet, those sources say. Any potential Simmons deal with the Celtics would have to include All-Star forward Jaylen Brown, an ascending talent who is in the midst of another career season, averaging 25.6 points, 6.1 rebounds and 2.5 assists.