It was the second consecutive overtime victory for Atlanta. The Hawks beat Cleveland in double overtime Thursday.
The Hawks trailed by 14 with 4:19 left in the third quarter.
But Atlanta, which has won two in a row and five of six, rallied to force overtime when backup center Pero Antic made a 3-pointer off one leg from the right wing with 3.1 seconds left in regulation.
Al Jefferson had 24 points and a season-high 23 rebounds, and Gerald Henderson added 22 points for Charlotte.
• Hawks coach Mike Budenholzer says the team isn’t sure how much time Al Horford will miss after tearing his right pectoral muscle.
Horford, who missed most of 2011-12 with a torn left pectoral muscle, was injured in the first overtime Thursday night in the victory at Cleveland and likely will need surgery.
Horford leads the Hawks in scoring and rebounding, averaging 18.2 points and 8.4 rebounds.
HEAT: An ailing LeBron James sat out Miami’s game against the Portland Trail Blazers on Saturday night, the first game the Heat star has missed this season.
James injured his right groin in the second quarter Friday night in a 108-103 overtime loss at Sacramento that snapped Miami’s six-game winning streak.
He stayed in the game and finished with 33 points, eight rebounds and eight assists.
James also tweaked his left ankle in the loss.
KNICKS: Were without leading scorer Carmelo Anthony and forward Metta World peace for Saturday’s 115-100 loss to Toronto.
Anthony, who did not travel to Toronto, missed his third consecutive game with a sore left ankle. Coach Mike Woodson said he hoped to have Anthony back when the Knicks visit Texas next week for games at San Antonio, Houston and Dallas.
Anthony was injured in Monday’s win at Orlando and has since sat out home losses to Oklahoma City and Toronto.
PELICANS: Guard Eric Gordon missed Saturday’s game against the Houston Rockets with a right hip contusion. The Rockets won 107-98.
Gordon missed the Pelicans’ 105-89 win over Denver Friday night because of the injury as well.
Gordon, who is averaging 15.4 points per game, was injured in New Orleans’ win against Sacramento on Monday.
night when he was knocked to the ground by Kings’ guard Isaiah Thomas while going for a layup.
Anthony Morrow started in place of Gordon Friday night and scored eight points.
While Gordon was out, reserve center Jason Smith returned after missing three straight games because of a right knee bone bruise. Smith, who has averaged just over 10 points and six rebounds a game this season.
BUCKS: Center John Henson had to celebrate his birthday Saturday on the bench with a left leg injury.
Henson, who turned 23, said he thought he might have a high ankle sprain, though he is supposed to undergo more tests to determine exactly what’s ailing him.
Henson leads Milwaukee in rebounding (8.0 per game) and blocks (2.25 per game). He is third on the team in scoring at 12.4 points.
The Bucks did get Larry Sanders back Friday after the shot-blocking center missed 25 games following surgery on his right thumb.
Injuries have been a problem all season for Milwaukee (6-23), which has the worst record in the NBA.