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The numbers are in for defensive end Mario Williams. And they’re impressive.

A source with knowledge of the contract tells PFT that the deal has a base value of $96 million over six years, including $25 million fully guaranteed on signing. Another $25 million is guaranteed for injury on signing, and the money will become fully guaranteed at a later date.

The deal can be worth as much as $100 million.

Williams, who made nearly $60 million in six seasons with the Texans, will earn $53 million in his first three seasons with the Bills.

Williams missed much of the 2011 season with a torn pectoral muscle suffered in the fifth game of the season. He had make a quick transition to the team’s new 3-4 defense.

In Buffalo, he’ll be back in a 4-3 defense — and he’ll be able to focus on rushing the passer.