Rajon Rondo  made Celtics  history less than five minutes into the game when he broke Bob Cousy’s 50-year-old single season assist record. Rondo dished his 716th dime of the season, an alley-oop to Kevin Garnett , to set the mark. (Earlier in the season, Rondo passed Rick Fox for the franchise mark in single-season steals.)
But back to the game. The Celtics gave up an early 11-point lead to trail the Rockets 32-30 after the first quarter. The Rockets closed the quarter on a 19-6 run, led by eight points in less than six minutes from Kyle Lowry . Paul Pierce , Kendrick Perkins , and Aaron Brooks also scored eight in the quarter. The Celtics outshot the Rockets, 59 percent to 50 percent, but were outrebounded, 12-7.
The C’s trailed in the second quarter before Rondo sparked a comeback. Rondo leapt for a defensive rebound and threw an outlet pass as he lost his balance, which Pierce connected for a lay-in. On the next possession, he set Perkins up for a bucket. The C’s took the lead back on a dunk by Tony Allen . The Rockets fought back, though, and are up 57-53 at halftime.
Brooks leads all players with 17 points. Pierce has 14 for the Celtics. Rondo has a game-high seven assists.