I didn't catch the game, so I'll link to someone that did.

Green Street " Fast Break: Rondo, headband of brothers take down Nets

Rajon Rondo has rarely worn a headband since NBA commissioner David Stern issued a rule against wearing the logo upside down (a slight to Lakers legend Jerry West) at the start of last season, but the Celtics point guard sported his good luck charm backwards against the Nets in a 107-94 win over the Nets. Perhaps Rondo needed a change of scenery after all the recent talk of him maybe getting … well, a change of scenery before the March 15 trade deadline (a notion C’s president Danny Ainge denied on Thursday). Whatever the case, the three-time All-Star floor general submitted his second straight sublime performance, amassing 14 points, 13 assists, five steals and two rebounds just two nights after recording his third triple-double of the season. Likewise, Kevin Garnett (20 points, 10 rebounds) — one of few Celtics regulars sans headband — continued his productive stretch, dropping at least 20 points and 10 rebounds in two straight games for the first time in exactly one year. Paul Pierce (27 points) led five C’s scorers in double figures.

I do believe that's three in a row. It would be just like this team to not lose until after the trade deadline, then take the foot off the gas thinking that they are "back" and can coast till the playoffs.