Brad Stevens spoke on Celtics media day at the Auerbach Center on Tuesday and spoke with a very optimistic tone about the progress of Porzingis amid his rehab. “Kristaps obviously had the surgery that was well documented after the year and seems to be recovering well,” Stevens said.

Boston Celtics president of basketball operations Brad Stevens provided an encouraging update on big man Kristaps Porziņģis, who underwent offseason

Particularly of interest were his comments on the health of multiple Boston frontcourt players, and navigating the presumed changing of ownership that the Grousbeck family are pursuing almost from the moment the Celtics won Banner 18.

Al Horford will be the one primarily responsible for filling Kristaps Porzingis’ shoes while the latter recovers from offseason leg surgery. But Porzingis’ absence — which is expected to stretch at least into December — also will require more prominent contributions from a handful of other Boston bigs.