Bills DE Mario Williams upbeat after arriving for voluntary workouts

Buffalo Bills defensive end Mario Williams is pleased to learn he'll have one less burden to lug around this season.

Upon arriving for the start of the team's voluntary workout program Tuesday, Williams was presented a brand new iPad, which will now store the team's hefty playbook.

More intriguing for Williams is what that game plan will resemble with Mike Pettine taking over as defensive coordinator as part of rookie coach Doug Marrone's new staff. Pettine is expected to bring to Buffalo the aggressive approach he was known for during his previous four seasons with the New York Jets.

Refusing to call this a "rebuilding season," Williams is confident the Bills have enough in place to grow from last year's 6-10 record.