Rajon Rondo busted out the headband against the Nets on Friday. (AP)

Maybe it was the trade rumors. Maybe he was feeling nostalgic. Or, maybe, he just wanted to blow up everyone’s Twitter feed and create some mayhem on a Friday night.

Whatever the reason, for the time since the Celtics played in the NBA Finals in two seasons ago, Rajon Rondo wore a headband while playing against the Nets.

“I just felt like a change,” Rondo said. “I just needed a change tonight. You may not ever see it again.”

For the majority of his six-year NBA career, Rondo wore a headband with the NBA logo facing upside down, but the league instituted a rule against wearing headbands inside out. After the 2009-10 season, the league instituted a policy outlawing Rondo’s inverted style. He hasn’t worn a headband in game-action since.

“I think it’s my statement — my signature statement when I won a championship,” Rondo said. “Who knows? People ask me all the time why I don’t wear it anymore. I tried to get a petition, but it didn’t go through.”

It wouldn’t be the worst thing in the world for the Celtics if Rondo kept his retro-look en vogue. His line Friday night: 14 points, 13 assists and five steals. And even though he mentioned that he wore the headband on a whim and possibly not donning it again, Rondo wasn’t ruling anything out.

“I’m 1-0 in the headband this year,” he said. “So I might try to keep the streak alive Sunday.”