(Justin Edmonds / Getty Images)

Terrelle Pryor, who suffered a concussion in the Oakland Raiders’ loss Monday to the Denver Broncos, is not practicing today.

Matt Flynn worked with the first-team offense as the Raiders began preparing to play the Washington Redskins on Sunday in Oakland, according to the Associated Press and Bay Area media.

Pryor has not yet been cleared by doctors to return to practice and the NFL Players Association is looking into whether league protocol was followed when Pryor was hurt. He remained in the game for two plays.

“It’s questionable,” an unnamed source told ESPN.

Pryor’s tweets sent mixed signals Tuesday:

 

 

Follow @CindyBoren on Twitter and on Facebook.

More

Redskins preparing to face Pryor