The Portland Trail Blazers haven't ruled out the possibility of trading for LaMarcus Aldridge, according to a source.

Aldridge left the Blazers to sign with the San Antonio Spurs in 2015. 

The Blazers would only be willing to complete a trade for Aldridge with the Spurs if they sent out matching salary. Portland owns three first round picks and is also interested in sending out salary. Portland has limited cap flexibility after their 2016 offseason.

The Spurs presumably have wanted to clear Aldridge's salary to create cap space.