We've been through the list before: in the last year alone these defensive bigs have hit the market or changed addresses via trade: Ben Wallace, Tyson Chandler (PJ Brown too actually), Nazr Mohammed, Rasho Nesterovic (borderline), Dan Gadzuric, Eddie Griffin, Samuel Dalembert, Jamaal Magliore, Stromile Swift, parens on Nene (borderline) and Reggie Evans (rebounder), DeSagana Diop, Francisco Elson, Darko Milicic, Kelvin Cato, Theo Ratliff, Joel Pryzbilla, Zydrunas Ilguaskas (shotblocker, but not really great defender), Steven Hunter, Kurt Thomas (old)....and I'm probably missing a few.