Updated

Atlanta, GA (SportsNetwork.com) - The Atlanta Hawks have announced that leading scorer Al Horford will be sidelined indefinitely after tearing his right pectoral muscle.

The center suffered the injury during Thursday's double-overtime win at Cleveland.

"We will work with Al and complete our due diligence to determine the next best steps for him," said president of basketball operations and general manager Danny Ferry in a statement. "Injuries are part of the challenge of an NBA season."

Horford has averaged 18.6 points, 8.4 rebounds and 2.6 assists in 29 games this season.

The team also said forward DeMarre Carroll is listed as day-to-day with a thumb injury.