Rajon Rondo

In Paul Pierce’s mind, there were many factors that went into the dismantling of the Celtics roster this offseason. That chain reaction, however, may have started on Jan. 27, 2013. It was on that winter day — one where the Celtics dramatically defeated the Miami Heat in double overtime at TD Garden — that the team learned point guard Rajon Rondo would need surgery to repair a tear in his ACL, ending his season.

With time growing shorter with every passing game for the old Celtics core and with Rondo’s health uncertain for the upcoming year as he rehabs his knee, Pierce acknowledged that the injury was a big reason why he is now wearing a Brooklyn Nets uniform and not the one he wore for the past 15 years.

“It would be hard to contend,” Pierce told the Herald yesterday, the last day of his camp at Basketball City in the shadow of the Garden. “I saw the vision. I saw all that. As a player, I’m selfish. I want what’s going to be good for me and the team. But you’ve got to look at the management looking at what’s down the road. If it’s up to me I would want to rebuild to win a championship by bringing players in. They were looking at the future, down the line.

“Rajon might not be here for the beginning of the year or however long he takes, so it would be tough for us to be a contender or get in a position to contend. Everybody saw that and I think that helped the decision on both sides.”

Reported by Tom Layman of the Boston Herald