The Mavs lost a tough one at home in Game 3. The Boston Celtics beat the Dallas Mavericks 106-99 in a thriller to take a commanding 3-0 lead June 12 in Dallas. The Celtics were led by Jayson Tatum and Jaylen Brown who scored 31 and 30 points.  Luka Dončić and Kyrie Irving led the Mavs.   Irving finally ended his struggles of Game 1 and Game 2, scoring 35 while Dončić scored 27. The Mavericks started off hot in a must win game going on a 22-9 run but the Celtics would cut it down to one at the end of...