Terry Rozier can still make an impact for the Celtics coming off the bench. Plus Robert Williams impresses teammates with his poise and maturity. Chris Grenham, Jimmy Toscano and Josue Pavon report from the Garden.   Our Presenting Sponsor: One in 100- Score a Pair of Celtics, Patriots Bruins or Red Sox Tickets for LESS than a Pizza or Beer! Go to http://bit.ly/2OKvuIA for more information.    SUPPORT CLNS MEDIA'S PROGRAMMING: Our Presenting Sponsor: One in 100- Score a Pair of Celtics, Patriots Bruins or Red Sox Tickets for LESS than a Pizza or Beer! Go to http://bit.ly/2OKvuIA for more information.