Linebacker London Fletcher brings down Saints running back Darren Sproles during the Redskins’ season opening victory.

Linebacker London Fletcher missed practice for a second straight day Thursday and was undergoing testing for problems with balance that have affected him this week, Coach Mike Shanahan said Thursday.

   Shanahan said he had not spoken to doctors and didn’t know the outcome of Fletcher’s evaluation, which, he said, lasted six to seven hours Thursday.. He said it was not clear whether Fletcher’s difficulties were related to a  concussion.

   If Fletcher has experienced any similar issues in the past, Shanahan said, he hasn’t shared that with the team.

   “I’m sure he’s a little scared, too,” Shanahan said.

   It is not clear whether Fletcher, who has played in 231 straight games, the longest active streak in the NFL, will play Sunday at Pittsburgh. Fletcher also has a hamstring injury and Shanahan said he has not been able to evaluate the status of that.

   Shanahan said it is not clear when wide receiver Pierre Garcon might play again. If Garcon’s ailing foot doesn’t heal on its own, Shanahan said, other options will have to be considered.

   Shanahan called Logan Paulsen the team’s No. 1 tight end with former starter Fred Davis injured and out for the season. He also said he is pleased with what he has seen this week from newly re-signed tight end Chris Cooley.

   Offensive coordinator Kyle Shanahan said Cooley has “looked good” in practices this week. He said the Redskins will try to devise ways to get the most out of Cooley, Paulsen and the team’s third tight end, Niles Paul.

   “They all can do a little bit of everything,” Kyle Shanahan said.