Imprisoned former WorldCom Inc chief Bernard Ebbers has joined the list of high-profile corporate defendants petitioning for clemency in the final days of President George W. Bush's term in office.

Ebbers, convicted of orchestrating an $11 billion accounting fraud, joins former publishing mogul Conrad Black and 1980s-era financier Michael Milken in seeking clemency.

The Justice Department said on Wednesday that Ebbers has submitted a petition for commutation of his 25-year sentence to the Office of the Pardon Attorney. The petition is under review, Justice Department spokeswoman Laura Sweeney said.