After failing his conditioning test Sunday, Bills defensive tackle Marcell Dareus was placed on the Non-Football Injury list, meaning he can't practice with the team until he's moved to the active roster.

It might be a while.

Bills coach Doug Marrone told reporters Monday that he excused Dareus from camp because "he's taking care of some personal stuff."

No word on what that personal stuff entails, but Marrone also said he'll be on the sideline training and getting ready to pass his physical. Dareus was expected to return to the Rochester, N.Y. training camp later Monday.