From ESPN/AP report:

 

Boston Celtics star point guard Rajon Rondo has a torn ACL in his right knee and will miss the remainder of the season.

The Celtics announced Rondo's injury Sunday during their game against the Miami Heat, stating that the four-time All-Star will undergo surgery.

 

The initial report was a hyperextended knee but tests showed the ACL tear, an injury that usually takes up to a year for recovery. A date for the surgery had not been scheduled as of Sunday afternoon, said team spokesman Brian Olive, who confirmed that Rondo's season is over.

Rondo, averaging 13.7 points, 11.1 assists, and 5.6 rebounds in 38 games this season, was a late scratch for Sunday, two days after suffering the injury in a loss to the Atlanta Hawks, a game in which the Celtics squandered a 27-point lead.

Rondo attempted to warm up for Sunday's game, but the injury did not improve. He was scratched from the lineup shortly before tip-off and traveled to New England Baptist Hospital for an MRI.

Rondo's injury will cripple the Celtics, whom relies on him an inordinate amount, from play-calling, orchestration, ball-pressure, rebounding help -- you name it. Rondo is up there with Chris Paul and LeBron James when it comes to the breadth and importance of responsibilities he burdens. During a televised post-game interview, Paul Pierce learned of the extent of Rondo's injury and let out an audible groan with a visible grimace. The Cs know they're in trouble with this one. End of era?