Shortly after agreeing to acquire Malcolm Brogdon and Danilo Gallinari earlier this month, Brad Stevens reached out to Marcus Smart to discuss the additions. During the conversation, Smart said he and Stevens reflected on all the years they have worked together and all the progress the Celtics have made during that time. “We were this close,” Smart said Tuesday at Emmanuel College, where he watched team YGC, named after his YounGameChanger Foundation, practice for The Basketball Tournament. “We really think that Malcolm’s a great fit and Gallo to help us get over that hump.”