Mario Williams returns to Bills training camp

Answers about the injury are apparently tough to come by, even for Bills head coach Doug Marrone, who told reporters on Monday that he first heard about the injury on Sunday after Williams was already “off-campus.” Marrone also said that he couldn’t provide details about the extent of the injury, how it occurred or which foot was injured.

Although the injury was not detected in the pre-camp physical, Marrone told Graham that he endorses Williams’ absence from the practice field: