The Celtics  submitted another miserable offensive effort, shooting worse than 40 percent from the field, and fell into a 3-0 hole against the Knicks with a 90-76 loss in Game 3 of their first-round playoff series. Kevin Garnett  totaled 12 points and 17 rebounds, Jeff Green  gave them 21 points and eight boards, and Jason Terry  and Paul Pierce  combined to score 24 of their 31 points in the second half, but none of it mattered in a game the Knicks led by as many as 21 points. Here’s all that went awry.
WHAT WENT WRONG
Everything: When 31 points in the first half is an improvement from their last half of basketball, the Celtics are in trouble. After scoring 23 points in the second half of Game 2, the C’s managed just 31 points in the first two quarters on Friday night. They shot 35 percent from the field (14-40) and committed three more turnovers (9) than they had assists (6) at the break. Outside of Garnett and Green, who combined to score 17 of those 31 points, the Celtics shot 6-of-22 (27 FG%) thanks to an offense that featured a string of failed turnaround jump shots.
Lineups: To the surprise of pretty much everyone, Doc Rivers  inserted Terry into the starting lineup in place of Brandon Bass . The move failed miserably, as the Celtics found themselves in a 16-9 hole when Rivers replaced Terry with Courtney Lee  with 4:20 left in the opening quarter. This after the Celtics coach benched Lee in favor of Jordan Crawford in Game 2. At one point in the second quarter — as Garnett, Chris Wilcox  and Shavlik Randolph sat on the bench — Green guarded 7-foot-1 Tyson Chandler . Odd moves all.
Pierce: After carrying the load in Games 1 and 2, Pierce looked cooked. He shot 2-of-10 in the miserable first half, committing three turnovers in that span and bumbling another handful of balls. And then started the third quarter by throwing the ball to Raymond Felton . The Celtics looked old, tired and slow, and Pierce epitomized all of it. He battled, as he always does, but his tank was running on empty.
WHAT WENT RIGHT
Garnett: As usual, Garnett came out like a wild man, nearly notching his double-double by halftime. Why the Celtics didn’t feed him more was a mystery. KG played his manic defense, too, neutralizing Chandler and Kenyon Martin . Meanwhile, Carmelo Anthony (26 points), J.R. Smith (15 points before being ejected in the fourth quarter) and Felton (15 points) continued to force their will upon the rest of the C’s. It wasn’t for lack of effort. Garnett gave them that. The Celtics just didn’t have the personnel to match the Knicks.
Green: While everything crumbled around him, Green gave the Celtics everything they had hoped for all season. He attacked the basket and cleaned the glass, making an impact in the flow of the game while playing the majority of his minutes alongside both Pierce and Garnett. Green was supposed to be the X-factor in this series, but instead he’s been one of the only factors. Exhibit 326: Smith has outscored the entire Celtics bench 49-33 in the series.
Rebounding: At least the Celtics did something well. Pierce and Bass aided Garnett and Green on the glass, each grabbing at least four boards by halftime. The C’s out-rebounded the Knicks 41-37 for the game and here’s the real shocker: They even grabbed more offensive boards than New York (11-6). Of course, their inability to make baskets gave them plenty of opportunities for offensive rebounds.