Steve Nash said his back locked up on him during the first quarter of Friday's game against the Blazers.
Johnny O'Bryant will start at power forward against the Kings.
Giannis Antetokounmpo (ankle) will start against the Kings on Thursday.
DeMarcus Cousins will start against the Bucks on Thursday with a minutes limit.
Andrew Bogut's agent David Bauman speculated that Bogut might be able to return "sometime in January."
Nicolas Batum (left knee contusion, right wrist) is questionable to play against the Spurs on Friday.
Taj Gibson (ankle) will not play against the Knicks on Thursday.
Austin Rivers will start in place of Tyreke Evans (knee) on Thursday.
Tyreke Evans (knee) will not play against the Rockets on Thursday.
Amare Stoudemire will start Thursday as the Knicks take on the Bulls.
The Knicks will start Jose Calderon, Tim Hardaway Jr., Travis Wear, Cole Aldrich and Amare Stoudemire against the Bulls on Thursday.
Carmelo Anthony (knee) will not play against the Bulls on Thursday.