The Heat had been interested in acquiring Roger Mason, but ultimately balked at adding salary.

The Spurs were hoping to tempt Miami into absorbing Mason's $3.8 million expiring contract into a $4.3 million trade exception that would have enabled the teams to complete a deal without San Antonio needing to take back another player. A future second-round pick from the Heat would have completed the transaction.

Miami's trade exception, acquiring during last year's Shawn Marion/Jermaine O'Neal trade with Toronto, expired on Monday.