Horford will now undergo a period of rest, treatment and rehabilitation. He will be out through the remainder of the season.
At the time of his injury, the 6-foot-10 forward/center led the team in scoring (18.6), field goal percentage (.567; 7th in league), rebounding (8.4) and blocks per game (1.5; 13th) while adding 2.6 assists in 33.0 minutes per game in 29 games (all starts).