Joe Mazzulla speaks to the media after the Celtics blow a 20-point lead in Game 1 of the Eastern Conference Semifinals against the Knicks. SUBSCRIBE TO OUR CHANNEL: youtube.com/user/CBSSports WATCH CBS Sports HQ: cbssports.com/live Paramount Plus: paramountplus.com FOLLOW US ON: Facebook - facebook.com/CBSSports Instagram - instagram.com/cbssports Twitter - twitter.com/CBSSports #nba #nbaplayoffs #celtics #joemazzulla #pressconference