Celtics 129, Wizards 119 (OT)

Isaiah Thomas scored 53 points, nine in overtime, to help host Boston beat Washington and take a 2-0 lead in the best-of-seven Eastern Conference semifinals.

Fiddling with the mouth guard he began using after losing one of his front teeth in Game 1, Thomas became the fourth player in the history of the NBA’s most-decorated franchise to score 50 or more points in a postseason game. It was also a career best for Thomas in a playoff game.

John Wall had 40 points and 13 rebounds for the Wizards.

The series moves to Washington for Games 3 and 4 on Thursday and Sunday.

LATE MONDAY:?Rockets 126, Spurs 99

Trevor Ariza scored 23 points, James Harden added 20 points and 14 rebounds, and Houston stormed past host San Antonio Monday night in Game 1 of the Western Conference semifinals, the Spurs’ worst loss in a series opener under Gregg Popovich.

The Rockets were 22 for 50 on 3-pointers, the most 3s attempted and made against the Spurs in their long postseason history.

Houston had six players in double figures, including 20 points and 13 rebounds from Clint Capela.

Game 2 is Wednesday in San Antonio.

Houston led by as many as 39 points, including a 30-point lead in the first half, in the opener of the first series between the rivals since the Rockets’ victory in the 1995 Western Conference finals.

NOTEBOOK:?Jackson, ESPN deal

Mark Jackson has signed a multiyear deal with ESPN to continue calling NBA games, including the NBA Finals.

Jackson and partners Mike Breen and Jeff Van Gundy will work the finals in June for the eighth time, extending their own record for a TV team.

The deal with Jackson was announced Tuesday. Last week, ESPN laid off about 100 employees, including some of its high-profile TV talent.

Jackson played 17 years in the NBA, including seven seasons with the Knicks and six with the Pacers, and is fourth on the career list in assists. The 1988 Rookie of the Year joined ESPN in 2006 and called games on ESPN and ABC through 2011 before leaving to coach the Golden State Warriors. He rejoined the network during the 2014 playoffs after being fired by the Warriors.