Redskins Coach Mike Shanahan said the team doesn’t yet know how long right tackle Jammal Brown, who suffered a groin injury in Sunday’s loss to the San Francisco 49ers, will be out.

Originally, the Redskins announced that Brown had injured his hip. Brown suffered the injury during the game, left for one series, returned for another and then had to leave for good. But after the game, Brown informed the team’s staff that he had actually injured his groin and struggled to move laterally.

Sean Locklear, who had started the last two games at left tackle but returned to a reserve role when Trent Williams returned, took over at right tackle. Shanahan said Locklear “fought in there, not having practiced at that position. I thought he did pretty good.”

Rookie wide receiver Niles Paul is expected to miss “a couple of weeks,” with turf toe, Shanahan said. Drafted in the fifth round out of Nebraska, Paul suffered the injury while returning a late-game kickoff. When he was tackled, Paul said, his toe was bent awkwardly. X-rays came back negative.

Meanwhile, the coach said that the team decided Saturday to place cornerback Phillip Buchanon on injured reserve because the veteran backup was not able to recover quickly from a variety of injuries. Buchanon has been limited in practice by neck and knee injuries.

“I sat down and talked to Phillip, and you could tell,” Shanahan said. “Phillip is always a guy that’s fought back from injury pretty quickly, and you knew he was injured. He was not your typical Phillip Buchanon [in] practices during the week. He was in some pain. When I sat down with him, he was pretty honest with me that he thought it was going to be a while before he came back, so we decided to put him on IR.”

Shanahan described Buchanon’s injuries as “a little bit of everything: hip, knee, shoulder.”