For all the star power of their five best players, this season’s Boston Celtics had a bit of a bench problem. The center situation has been discussed to death, and the wings lacked a reliable backup presence with Semi Ojeleye failing to develop and Romeo Langford struggling to stay healthy. In the playoffs, it became almost impossible to predict who Brad Stevens might plug in at a given time. For all the uncertainty though, the Celtics found unlikely stability at backup point guard thanks to the contributions of Brad Wanamaker.