NBA commissioner Adam Silver has dismissed suggestions that Jason Collins's sexuality is the reason why he is without a team at the moment.

The 35-year-old center publicly came out as gay in April 2013 after finishing his 12th NBA season, but has since not been able to find a club and is currently a free agent.

"In terms of Jason not getting signed, based on everything I've been told, it's a basketball decision," ESPN quotes Silver as saying.

"Our teams want to win and Jason waited until the very tail end of his career to make that announcement. We want teams to make the best possible decisions from [a] basketball standpoint.

"Ultimately, that's what it's all about. I'm sure Jason was never looking for a special favour or a special slot because he had publicly come out."

Collins last played for the Washington Wizards.