The Celtics saw it differently. They saw a team that needed to be broken up. They saw a duo that needed to be split. They saw a decade of success—six conference finals, two NBA Finals, one championship—that had run its course. Said a league source familiar with the Celtics’ thinking, “J.B. had to go.”

This article originally appeared on Hoops Hype: Said a league source familiar with the Celtics’ …