LeBron James is seriously considering running for president of the National Basketball Players Association, multiple sources told ESPN.

James is giving a run "some very heavy thought," one source said.

The biggest consideration for James will be the time commitment being the union president would require. James has limited time to give because of sponsorship and charity commitments in addition to playing. Deep playoff runs with the Miami Heat the past three seasons have also been taxing.

Still, James has been investigating the issue with advisers and fellow players this summer.