Cooper appeared to be a significant part of the offense, playing the outside receiver spot with the first-team offense.
Dorenbos exits early
Long-snapper Jon Dorenbos left Friday's game in the second quarter because of a concussion. He was carted off the field from the sideline after he came off slowly following a punt return.
Tight end Brent Celek worked on long-snapping with Dorenbos absent.
Dorenbos has played in every game since the Eagles signed him late in the 2006 season.
Linebackers Jamar Chaney (shoulder) and Casey Matthews (knee) also left the game early with injuries.
McCoy sits out
LeSean McCoy, despite practicing Thursday, did not dress for Friday's game. The starting running back missed most practices this week as he nursed a knee injury.
McCoy did not participate in any of the scrimmages between the Eagles and Patriots on Tuesday and Wednesday in anticipation of the preseason opener. McCoy was active the next day during a light practice, but did most of his work with the third-team offense.
Chris Polk and Bryce Brown shared the load at running back with the starting offense. The second-year players are in an apparent competition for the backup tailback spot, behind McCoy. Veteran Felix Jones, signed in the offseason, hasn't had as strong a training camp.
Wide receivers Damaris Johnson and Russell Shepard, who left Wednesday's practice early with hamstring injuries, were active.
Peters, Williams absent
As expected, tackle Jason Peters and cornerback Cary Williams did not suit up.
Coach Chip Kelly said Thursday that neither injured player would play against the Patriots. Peters and Williams have missed a number of practices with recurring hamstring injuries.
Veteran Allen Barbre started in Peters' place at left tackle. The Eagles had been sliding rookie Lane Johnson from right tackle to left tackle when Peters missed his first couple of practices. Johnson is expected to be Peters' backup when the season starts.
Kelly, in explaining Barbre's start, said he wanted to develop depth at tackle. Dennis Kelly would typically be in the mix at backup tackle, but he had back surgery to correct a herniated disk this week and will miss all of the preseason.
Brandon Hughes started for Williams. Kelly said Brandon Boykin would start Thursday. The second-year corner, who played primarily in the slot last year, has had a strong camp and could get the opportunity to start outside.
Bradley Fletcher started at the other cornerback spot. Patrick Chung and Nate Allen started at safety.
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