The Miami Heat fear Chris Bosh's condition may prevent him from ever being cleared to play again by team doctors.
Bosh has had a series of consultations with specialists and a medically forced retirement is possible.
"I feel very badly for CB because I know how much this game means to him," Erik Spoelstra said Sunday after his team's Game 7 loss to the Toronto Raptors. "I think everybody knows how much CB means to me."
Neither the Heat nor Bosh have announced the nature of his medical condition.
Two weeks ago, after months of silence, they released a joint statement that read: "The Heat, Chris, the doctors and medical team have been working together throughout this process and will continue to do so to return Chris to playing basketball as soon as possible."
Bosh wants to play and the Heat would love to have him return
According to league rules, if he does not play again by Feb. 9, 2017, an independent doctor approved by the Heat and the player's union can review Bosh's case and give a recommendation to the league.
Bosh is owed $75 million over the next three seasons and would receive the entire amount.
Bosh's salary would come off the salary cap in the summer of 2017 if he doesn't return.