Sounds like the Mario Williams deal with the Buffalo Bills will get done, according to Alex Marvez of FOXSports.com who cites a source close to the situation who says the deal "will be done." Williams is the No. 1 defensive free agent on the market.
Buffalo was Williams' first visit which shows you the importance of getting a guy into your facility before anyone else does in free agency. The Bills have had Williams in Buffalo for the last two days so it appears they're completing the negotiations process and Williams will soon be a Bill.
For more on Williams potentially signing with the Bills, check out Buffalo Rumblings.