It has been a frustrating start for the Melbourne-born Simmons' professional basketball career, after being selected by the 76ers as the No.1 pick in the 2016 NBA Draft.
Brown, a former Boomers Olympic and NBL coach, wants to see Simmons on the court, but there is speculation he could sit out the rest of the season to ensure his foot heals.
"I personally would like to see him play this season," Brown said. "I don't backpedal from that and I think my comments are really very much influenced by his reciprocal desire to play this year, which we all respect.
"Everybody's got clandestine conspiracy theories on why he might not want to play.
"I know in my heart and speaking to him, he wants to get on a court and play basketball again.
"I hope he can do that to, but if he can't we will deal with it."