The Redskins had yet to learn the severity of tight end Jordan Reed’s concussion as of Monday afternoon. Coach Jay Gruden admitted that there is a level of apprehension about the third-year veteran’s health. But he said it will take some time, with Reed being monitored in the concussion program, before the team’s medical staff gains a clearer understanding of the severity of the concussion.

“It’s a concern,” Gruden said during his weekly Monday press conference. “The level, these things are all different. Each player and the magnitude of the concussions, you just don’t know until they go through the protocol and get tested and all of the necessary steps. I don’t know the severity of it at all.”

Reed, who leads Washington with 278 receiving yards on 24 catches, also suffered a mild knee sprain and ankle sprain in Sunday’s game. But he returned, and Gruden didn’t believe that either of those injuries were serious in nature.

Reed missed six games with a concussion as a rookie in 2013.

If Reed can’t return by Sunday, when the Redskins play the Atlanta Falcons at the Georgia Dome, then Derek Carrier would start, Gruden said. A third-year veteran whom Washington acquired via trade from San Francisco late in the preseason, Carrier has four catches for 26 yards. He has played often because the Redskins use a lot of multiple-tight end sets, and Gruden said he believes Carrier is capable of making a larger impact.

No other players emerged from Sunday’s game with serious injuries.

Wide receiver Pierre Garcon, who caught the game-winning touchdown pass, has a mild knee sprain. Cornerback Chris Culliver reported inflammation in the hurt left knee that sidelined him in last week’s practices, but didn’t further injure himself, Gruden said.

The coach said that he expects wide receiver DeSean Jackson to try to ramp up his activity in this week’s practice. Jackson, the team’s top deep threat, has missed the past three games with a strained hamstring.

Gruden also hopes that inside linebacker Perry Riley Jr., who has missed the past two games with a strained calf muscle, will be able to return to practice this week.

Cornerback DeAngelo Hall, who is expected to miss another two to three games with a partially torn ligament in his right big toe, has begun the early stages of rehabilitation, but isn’t expected to practice this week.

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