Boston Celtics forward/center Al Horford is out Wednesday versus the Toronto Raptors.

Boston Celtics center Robert Williams (knee) is expected to return on Wednesday versus the Toronto Raptors, per head coach Joe Mazzulla.

Boston Celtics center Robert Williams (left knee injury management) has been ruled out again for Tuesday against the Philadelphia 76ers.

Boston Celtics center Robert Williams (injury management) is listed as doubtful for Friday's game against the Utah Jazz.

Boston Celtics forward Grant Williams (illness) is questionable for Thursday against the Milwaukee Bucks.

Boston Celtics forward/center Al Horford (low back stiffness) is out Monday versus the Cleveland Cavaliers.

Boston Celtics center Robert Williams could miss 7-10 days with a left hamstring strain, per head coach Joe Mazzulla.

The Boston Celtics are acquiring forward/center Mike Muscala from the Oklahoma City Thunder for Justin Jackson and two second-round picks.

Boston Celtics forward Al Horford (knee) has been ruled out of Wednesday's game against the Philadelphia 76ers.

Boston Celtics forward/center Al Horford (right knee swelling) has been added to the injury report as questionable for Wednesday against the Philadelphia 76ers.