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.
Bills LE Mario Williams credits a healed wrist for his recent surge in production.
Mario Williams recorded three sacks in Sunday's Week 12 loss to the Bills.
ESPN's Adam Schefter reported on Sunday Countdown that Bills LE Mario Williams played the first seven games with a torn ligament in his left wrist.
Bills LE Mario Williams (wrist surgery) is practicing in full this week.