MIAMI (AP) — Al Horford is back. Marcus Smart is planning to join him. The Boston Celtics are closer to whole for the Eastern Conference finals. Horford’s stay in the NBA’s health and safety protocols ended Thursday, a few hours before tipoff of Game 2 of the East title series against the Miami Heat. Horford missed Game 1 because of those protocols, related to the coronavirus, and Smart missed the series opener because of a mid-foot sprain.