It’s Sunday afternoon, and The Rev. Robert Gray preaches to his congregation wearing a stiff clerical collar and palming a well-worn Bible.
The reverend is dressed for church, but his congregation wears warm-up pants and T-shirts in green, black and burgundy. Gray wraps up his sermon and members of the Celtics and Cavaliers bow their heads as the reverend leads them together in prayer. It’s 40 minutes until Game 1 of the NBA Eastern Conference Finals tips off in TD Garden.