PITTSFORD, NY (AP) - Buffalo defensive end Mario Williams returned to training camp on the same day coach Doug Marrone grew frustrated over questions about his absence from practice due to a sore foot.
Williams was spotted in the passenger seat of an SUV making its way into the parking lot in front of the players' dorm rooms at St. John Fisher College in suburban Rochester at about 8 p.m. on Tuesday. The vehicle was driven by a member of the Bills training staff.
The area is off-limits to reporters. The sighting of Williams was the first since Sunday, when he was held out of the team's opening practice after complaining of a sore foot.
The Bills, who return to practice Wednesday, did not reply to questions regarding Williams' arrival.
The team has revealed very few details about the severity of Williams' injury, as well as the player's whereabouts.
Marrone grew impatient earlier Tuesday after facing a second consecutive day of questions regarding Williams.
After saying Williams was still having his foot evaluated, the first-year coach cut off a reporter to announce he won't answer any more questions about Williams until he receives a medical report from team doctors.
"For me to speculate, I never speculate until I hear from the medical staff," Marrone said. "And I get frustrated, honestly, when it gets to a point where I feel like I've tried to explain myself in how I handle injuries, OK? I've answered the questions, and you keep coming at me, all right?"
Otherwise, he had no other updates.
Marrone said he's not spoken to anyone, including Williams, regarding the player's status. The coach has yet to say which foot Williams hurt, and how or when the injury occurred. He also has not specified where Williams was being evaluated, except to say he wasn't present at training camp.
Williams declined to comment on his injury on Sunday, referring all questions to Marrone.
The Bills made a big splash in free agency in March 2012 when they signed Williams to a six-year, $100 million contract.
Williams, however, had an inconsistent first season in Buffalo. He was bothered by an injured left wrist, which he had surgically repaired during the team's bye week in late October.
He finished the season with a team-leading 10½ sacks — seven of them coming after he had the operation.
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