The Celtics had two head coaches present at Saturday morning’s practice. One, of course, was Joe Mazzulla. The other: Mazzulla’s new Patriots counterpart, Mike Vrabel.

Jayson Tatum is hoping to be the next Celtics legend that people think of. He already has a championship after helping the team win last season over the Mavericks. Tatum understands the history of the Celtics and what it means to be great. He is a student of basketball history and knows who the greatest players in NBA history are.

On this day in Boston Celtics history in 1991, Hall of Fame Boston Celtics small forward Larry Bird scored a triple-double against the Celtics' longtime rival Los Angeles Lakers on the road at the Los Angeles Forum in Inglewood, California as Boston won 98-85.