Bill Simmons drops 'locked in' Celtics' Joe Mazzulla-Jayson Tatum revelation
The Boston Celtics will be coming into the season trying to win a second championship in a row, and it's up to the leaders of the team to guide them. Head coach Joe Mazzulla has shown that he's the right person to lead the team, while Jayson Tatum has been the leader on the basketball court.