Mario Williams will play outside linebacker in Rex Ryan's new 3-4 scheme.
Bills LE Mario Williams underwent offseason hip surgery, but is participating in Organized Team Activities.
Bills OLB Mario Williams recorded just two sacks in the final eight games of the season.
Bills OLB Mario Williams registered two sacks in Sunday's Week 7 upset of the Dolphins, bringing his season total to ten.
ESPN's Adam Schefter reports Mario Williams has been diagnosed with a sprained ankle, but is currently planning to play in Week 4.
Bills coach Doug Marrone expects Mario Williams (undisclosed) and DT Marcell Dareus (ankle) to be "fine" for Week 4.
Mario Williams left Sunday's Week 3 loss to the Jets in the fourth quarter with an undisclosed injury.
Mario Williams set a franchise record with 4.5 sacks in Sunday's Week 2 win over the Panthers.
Appearing on NFL Network's GameDay Morning, Ian Rapoport reported Bills LE Mario Williams is battling plantar fasciitis.
Bills LE Mario Williams (foot) has rejoined the team at training camp.
A second opinion of Bills LE Mario Williams's troublesome foot revealed "no serious damage," and he's expected to be "fine."
Bills DE Mario Williams says he doesn't have a position in new DC Mike Pettine's hybrid 3-4 defense.
Bills LE Mario Williams expects to line up "all over the place" in new DC Mike Pettine's aggressive, blitz-heavy system.
Although new Bills DC Mike Pettine has been a 3-4 guru, he plans to run some 4-3 looks as well, depending on personnel.