PORTLAND, Ore. — There were just too many slip-ups, too many open Wesley Matthews 3-pointers, too many wide-open lanes for Victor Claver to prance down for an offensive rebound.

The Celtics’ 92-86 loss Sunday to the Portland Trail Blazers at the Rose Garden offered every reason why they won’t have lasting power when it comes to the postseason. They had every chance to win, every opportunity for a run, and simply blew it.