With Abdel Nader being recently waived, the Celtics have one open roster spot. And the Celtics are roughly 2-3 million over the luxury tax threshold.
Being so close to the luxury tax line, it would seem sensible for Danny Ainge to make a move or two to dip under it, mainly to avoid the repeater tax down the road. He may choose to keep that slot open, at least for now to help avoid becoming a tax payer this season. One possibility for that slot, after serving as a 2-way player last season, Jabari Bird is currently a restricted free agent, allowing Boston to match any offer from another team.