ORCHARD PARK, N.Y. -- Down two offensive lineman, the Buffalo Bills shifted their front line in Thursday's organized team activities.
With guards Chris Williams and Doug Legursky out of the voluntary practice, the Bills moved left tackle Cordy Glenn inside to guard for team drills. Second-team left tackle Chris Hairston moved up to the first team.
The Bills experimented with Glenn as a guard during training camp last summer. However, he remains a fixture at left tackle and would only be used at guard in emergency situations.
The Bills continued to tinker with their personnel at cornerback, replacing Mario Butler on the first team with Corey Graham. Nickell Robey, who lined up at nickel back on the first team beginning Wednesday, stayed in that role Thursday.
Overall, Thursday's practice was the sloppiest of the Bills' six OTAs thus far. There were a litany of miscues, especially on offense, that aren't out of the ordinary for this time of the year but will need to be cleaned up by training camp.
Wide receivers Marcus Easley and Cordell Roberson, running backs Bryce Brown and Ronnie Wingo, cornerback Darius Robinson, and guard J.J. Unga watched practice from the sideline as they continue to rehab from injuries.