Celtics likely to leave one roster spot open for free agent acquisition

The Boston Celtics expect to keep one of their four training camp invites, leaving one roster spot open to add a late buyout or remaining free agent.“I don’t know [if the Celtics will carry 15 players], I would say most likely not,” said Rivers. “There are guys still out there, unsigned. And we might want to sign them.”Pressed on potentially signing a veteran, Rivers cracked, “First come, first serve. Can we make an announcement to all the free agents?” He then laughed before turning more serious.“Really, we’re looking around. I still think there will be buyouts, probably starting [Thursday]. So there’s so many things that could happen and we want to make sure if that happens, we’re able to [sign a free agent] quick instead of a delay. We may keep 15 for a couple more days, but after that, we’re probably going to go to 14.”Based on preseason results and Boston’s roster needs, Greg Stiemsma will almost definitely make the Ce...