Backup Glen "Big Baby" Davis scored half of his 18 points in the fourth quarter, leading the Celtics bench as it pulled away from the Los Angeles Lakers to win 96-89 on Thursday night and even the best-of-seven series at two games apiece.
Game 5 is Sunday night in Boston. The Celtics' win guaranteed them a trip back to Los Angeles and averted a 3-1 deficit that has never been overcome in NBA history.
Kobe Bryant scored 33 points and Pau Gasol had 21 for the Lakers.
Paul Pierce scored 19 points, Kevin Garnett had 13 and Ray Allen bounced back from a seven-quarter shooting slump to score 12 points for Boston.