A day after returning to practice in a full capacity, Washington Redskins tight end Chris Cooley again is an observer while nursing his sore left knee. It’s the same knee in which Cooley this offseason had surgery to repair a torn meniscus.

 The Redskins’ second-leading receiver from last season, Cooley experienced some swelling in the knee last week and missed two days of practice. He returned to action Tuesday, but was back on the sidelines this morning as the team ran through drills.

 Meanwhile, the Redskins opened Day 13 of training camp with a minor roster move, cutting tight end Kevin Gidrey and replacing him with Derek Schouman, a fifth-year pro out of Boise State.

 Schouman in 2007 was drafted in the seventh round by the Buffalo Bills. best season was in 2008 when he started 12 games and recorded 15 catches for 153 yards and a touchdown.

 The 6-foot-2, 223-pounder spent time with the St. Louis Rams last season, but didn’t record a catch in four games.