Left Guard Battle: Doug Marrone said he's not pleased with how the left guard battle is shaping up between Colin Brown and Doug Legursky and said he may add another player into the competition. Brown has been taking almost all the first team reps but Marrone said nobody is distinguishing himself yet. No word on who he may add into the mix but it likely could be recently signed Antoine Caldwell who has more career starts than the other two. Depth Chart.

Mario Injury Not Serious: Mario Williams and Doug Marrone addressed the media after practice today. Marrone said the injury to the left foot of Williams is not serious but will require rest and treatment. Williams got a second opinion from renowed Dr. James Andrews who said it should be fine with some rest. Williams said it is not serious and he would be out on the field now but they are keeping him out as a precaution. He would not elaborate on how he injured it citing the team's rule not to have the players talk about injuries. Marrone said he will talk to the trainers before addressing the media from now on to get better information out on injuries. Justin Rogers is expected to miss a few days with a hamstring injury suffered yesterday. Kevin Elliott was carted off the field during Wednesday's practice after injuring his arm or shoulder. He hurt when he came down with a great diving catch. Scott Chandler had a scheduled day off from team drills today to rest his recovering knee. Injury Page.

Mario Dresses: The Bills hit the practice field for their fourth practice of camp today and their second straight 8am practice. Mario Williams was dressed in full pads and was the last player to go on the field. He went straight for the stationary bike and did not practice and left after about a half an hour with a strength and conditioning coach. Justin Rogers was the lone player not dressed for practice today. Joe Buscaglia of WGR tweeted that Leodis McKelvin was taking first team reps at corner. This is the first time in camp that has happened as he was being eased back in after undergoing groin surgery in the offseason. Scott Chandler did less work today than he has done so far in camp. Injury Page.

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Mario Back On Campus: Mario Williams has returned to St. John Fisher College. He was spotted last night and it was confirmed to AP that he was back. Doug Marrone is expected to updated the media on his condition after today's morning practice. That could be an interesting press briefing after Marrone got into it with well respected AP report John Wawrow yesterday. Marrone got fed up with the constant questions regarding Mario's status. He had no updates for two days. Pro Football Talk was first to report yesterday that Mario got a second opinion on his sore foot. He reportedly was told to rest it for a while but is expected to be fine.