Collison (ankle) will sit out Sunday's intrasquad scrimmage, Anthony Slater of The Oklahoman reports. The veteran entered camp nursing a knee injury and is now dealing with an ankle sprain. The team is likely holding him out as a precaution, more than anything else. When the regular season begins, Collison will resume his role as a utility big man off the bench behind Steven Adams or Kendrick Perkins, who are competing for the starting center spot.