Jaylen Brown and Jayson Tatum led the Boston Celtics to a 109-98 victory over the ClevelandCavaliers as Tatum returned from injury.The Celtics established a 26-point lead after holding the Cavaliers to 10 points in the second quarter while Donovan Mitchell scored 30.Boston secured a 3-0 season series lead in the NBA while playing without Nikola Vucevic following his finger injury earlier in the week.