ORCHARD PARK, N.Y. (AP) -Buffalo Bills starting quarterback Trent Edwards returned to practice Tuesday after missing a week with a bruised right thigh.
Edwards worked with the starting unit, which was without tackle Langston Walker, who watched from the sideline after hurting his left arm in a 20-7 win at Indianapolis on Sunday. Edwards' return means he'll likely see some playing time in the Bills preseason finale against Detroit on Thursday. He sat out the game against Indianapolis.
The injury was a setback for Edwards after a solid 9-for-11 for 104 yards and two touchdowns during a two-series appearance in a 24-21 win over Pittsburgh two weeks ago.
The Bills' 2007 third-round draft pick, Edwards replaced J.P. Losman as the starter midway through last season.
Walker's injury was described by the team as a bruise after it appeared he collided with fullback Darian Barnes while blocking Colts defensive end Ben Ishola in the second quarter. Coach Dick Jauron was expected to update Walker's status after practice.
Walker had difficulty moving his arm after he was hurt and was spotted wearing a soft cast immediately after the game. On Tuesday, Walker had much greater mobility in his arm, and even helped backup Demetrius Bell put on his shoulder pads.
The Bills are depleted at tackle as Walker, normally the starting right tackle, is starting on the left side in place of Jason Peters, who has refused to report to the team over a contract dispute. Reserve tackle Matt Murphy is also out indefinitely with a partially torn left rotator cuff.
That leaves Bell, the rookie seventh-round draft pick, as the interim starter on the left side.
The Bills also announced Tuesday they released four players, including cornerback Kennard Cox, the third of Buffalo's three seventh-round draft picks this year. Also cut were defensive end Shaun Nua, receiver C.J. Hawthorne and punter D.J. Fitzpatrick.
Fourth-string quarterback Matt Baker was also released after being placed on the waived-injured list.

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