Cooper (biceps) played 38 offensive snaps during Thursday's 33-26 preseason win over the Cardinals.
Cooper (biceps) signed a contract with the Raiders on Monday, Field Yates of ESPN reports.
Cooper signed a contract with Washington on Monday.
Cooper (knee) was active for Saturday's preseason game against the Colts.
Cooper (knee) participated in team drills during Sunday's practice as he saw his first 11-on-11 action of training camp, Matt Barrows of The Athletic reports.
Cooper (knee) has been cleared off the PUP list and will be eligible to return to practice, Cam Inman of the Bay Area News Group reports.
Cooper (knee) is expected to remain sidelined until training camp, Eric Branch of the San Francisco Chronicle reports.
Cooper (knee) will likely need four-to-five months of recovery, Mickey Spagnola of the Cowboys' official site reports.
Cooper recently underwent surgery to repair the MCL in one of his knees, Todd Archer of ESPN reports.
Cooper signed a one-year contract extension with the Cowboys on Tuesday, Todd Archer of ESPN.com reports.