Celtics ring in the new season looking like champions yet again Yahoo SportsCeltics raise banner 18 as franchise greats look on ESPNJoe Mazzulla, Celtics players have very different reactions over championship rings Boston.comFrom Bob Cousy to Jaylen Brown and Jayson Tatum, Celtics history is second to none The Boston GlobeTNT slammed for cutting to commercial during Celtics Banner 18 raising: ‘Disrespectful’ Boston Herald