The Sixers are engaged in four-team trade talks involving Dwight Howard that would net the team Andrew Bynum.

Bynum is eligible for an extension and is scheduled to be a free agent in 2013.

"The Sixers are willing to take a shot (without Bynum's commitment)," one source said.

Bynum could sign a three-year, $60 million extension, or wait for the offseason for a five-year, $102 million contract.