Porzingis (knee) is out for Wednesday's game versus the Timberwolves, Taylor Snow of the Celtics' official site reports.
Porzingis has been downgraded from questionable to out Wednesday due to a right knee contusion. Al Horford will likely start in Porzingis' absence. Porzingis is expected to suit up for the second half of Boston's back-to-back set versus Milwaukee on Thursday, per Jared Weiss of The Athletic.