The Celtics, led by Jo Jo White, prevailed at home in Boston over the Phoenix Suns. Boston held on for a 128-126 win in triple overtime to take a 3-2 series lead.
White finished with 33 points, nine assists and six rebounds.
The Celtics trailed by 110-109 with time running out in double overtime, when John Havlicek banked in a go-ahead shot. Time appeared to expire and fans stormed the court. However, one second was put back on the clock.
The Suns gave up a technical free throw to advance the ball and trailed by two. As time expired, Gar Heard hit a contested jump shot to tie the game and force a third overtime. He ended up playing 61 minutes in the game.
In the third overtime, Boston took a 128-122 lead. Phoenix cut the lead to 128-126 but never got the ball back before time expired.
Boston won Game 6 87-80 on the the road to clinch the NBA Finals.