Redskins coach Mike Shanahan said cornerback DeAngelo Hall was speaking out of frustration Monday night when he criticized a defensive play call that led to a crucial Dallas first down, and that he understood Hall’s competitive nature. The coach declined to say if he had spoken with Hall about his comments.

Shanahan said the blitz called by Defensive Coordinator Jim Haslett had produced positive results at other times in the game and this season.

Hall touched Dez Bryant’s face mask making the tackle on that play, but did not grab it, Shanahan said.

Shanahan said he was happy with how safety LaRon Landry played in his first game since last season. He said claims that the Redskins simulated Dallas’ snap count were false.

The coach praised tight end Chris Cooley’s efforts at fullback in Monday’s game and said not many players could pick up a new position and execute at the level Cooley did.

Shanahan said “the snap was good” on the Redskins’ blocked field goal and that Sav Rocca made an uncharacteristic error.

Shanahan said receiver Anthony Armstrong and fullback Darrel Young were limited in practice today. Armstrong left Monday’s game with a hamstring injury.