- Don’t expect Lonnie Walker IV to make the Celtics’ opening-night roster, according to Brian Robb of Masslive.com. The veteran wing was signed to a training camp deal and there are financial incentives for the Celtics to leave him off the roster, since it would cost the team millions more in luxury tax penalties to retain him. Robb pegs Walker’s chances of being on the 15-man roster to start the season at 30 percent.