Redskins' offensive lineman Jammal Brown takes part in a blocking drill during Mini Camp in June. (John McDonnell/THE WASHINGTON POST)

Shanahan said receiver Josh Morgan (pulled hamstring) likely will miss a couple days of action.

Meanwhile, fullback Darrel Young (hamstring) could be sidelined for as long as two weeks. Shanahan said the Redskins have a couple of adjustments they could make for the Buffalo preseason game Aug. 9, such as two-running back packages.

Shanahan said he notices improvements in young players such as linebacker Perry Riley and receiver Aldrick Robinson because they have been able to go through OTAs this year to improve their understanding of the defensive and offensive systems.

Shanahan said Brandon Banks has had a good offseason and has displayed maturity in his approach to preparation. The coach again stressed that Banks must prove himself as a contributor on offense, and said the receiver is doing well so far.