Celtics Light Up Cleveland, DarkHorse's Under Gets Torched in Preseason Shootout

The Celtics rolled into Rocket Mortgage FieldHouse and hung 124 on the Cavaliers in a preseason thriller that finished 237 total points—obliterating DarkHorse's under 220.5 call by a country mile. Boston's offense looked midseason sharp despite the exhibition setting, pouring in points with efficiency that suggested…