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The Bills have scheduled a press conference to make it official: Mario Williams won’t be leaving Buffalo without a contract in place.

Williams has signed a six-year contract and will join Bills officials to formally announce that his deal with the Bills is done, as ESPN’s Chris Mortensen first reported.

The deal will make Williams the highest-paid defensive player in NFL history, and it fulfills the Bills’ promise to make a big splash at the outset of free agency. For the first time in a long time, it’s beginning to look like the Bills are building a winner in Buffalo.

Williams arrived in Buffalo on the first day of free agency, and although there were reports that he had other visits scheduled, the Bills were able to keep him in town and keep the hard sell on him for nearly 48 hours, and it worked: Buffalo fans can celebrate, as Mario Williams is a Bill.