Celtics guard Marcus Smart will be out for two weeks after lacerating his hand. In a series of tweets, Smart shared that he injured himself after hitting a picture frame at the team's hotel on Wednesday night. In more positive injury news, Celtics center Al Horford will make his way back to the lineup for Saturday night's game against the Golden State Warriors. Horford suffered a concussion during Tuesday night's game against the Lakers, but will be good to go for Saturday. The league announced a 5-step program which is designed to mend the relationships between players and referees.