Jason Collier's family asked that results of his autopsy be kept private until after Wednesday's funeral.
Collier, the Atlanta Hawks' 28-year-old center, died early Saturday after he had trouble breathing in his north Georgia home.
"We need to make sure we're very thorough with this," Forsyth County Coroner Lauren McDonald III said Monday. "It's a situation that may take time. I really don't want to say too much until after the service, out of respect for the family, as far as talking about the results. They would appreciate if we could not discuss that aspect until after the service."
On Monday in Charlotte, N.C., Collier's uniform hung in an empty locker as the Hawks lost a preseason game to the Charlotte Bobcats. The team said it will leave the uniform in the locker and set out a chair for Collier before each game.
Players will wear permanent black shoulder patches on their uniforms to honor Collier, who was a part-time starter the last two seasons for Atlanta after three years in Houston. He began his college career at Indiana before transferring to Georgia Tech.
McDonald said his office is pulling Collier's medical records from the Rockets and Hawks and forwarding that information to the pathologist.
Foul play is not a suspected cause of death, he said.
"There is not anything that would cause anyone to think there was any foul play," McDonald said.
"I look at this guy as being as healthy as can be. It shocked me and shocked the family and of course the sports community. We want to make sure we do this very thoroughly, just as on any 28-year-old you would want to know, even if he wasn't in the good health Mr. Collier was."