BOSTON – The Celtics may actually be whole Monday night. Jaylen Brown has been upgraded to “Available” for this evening’s game against the Houston Rockets, while big man Robert Williams remains probable for the tilt. The sixth-year swingman is having a career-year for the Celtics, with Brown averaging 25.6 points off 49 percent shooting overall and 40 percent shooting from downtown. The big man is averaging 10.0 points, 9.8 rebounds and 1.8 blocks over 30.8 minutes per game.