ALAMEDA, Calif. -- The Oakland Raiders released defensive tackle Tommy Kelly on Wednesday, cutting ties with their longest-tenured position player on the roster.

The move is the latest to distance the organization from the era of late owner Al Davis. Kelly originally signed with Oakland as an undrafted free agent in 2004 and quickly became a mainstay on the defense, signing a $50.1 million, seven-year contract to remain with Oakland in 2008.

But general manager Reggie McKenzie cut Kelly two years before the end of that contract, getting Kelly's $6.5 million salary for 2013 off the books.

Kelly, 32, is the third prominent player acquired by Davis who has been released this month, following defensive back Michael Huff and receiver Darrius Heyward-Bey.

Punter Shane Lechler, safety Mike Mitchell, tight end Brandon Myers, defensive end Matt Shaughnessy and defensive tackle Desmond Bryant have also all left as free agents. Only 18 players who were part of the organization when Davis died Oct. 8, 2011, are still on the roster.