Washington LB Foster hurts knee

Washington linebacker Reuben Foster appeared to injure his left knee during his first snap at an offseason practice at Ashburn, Va., and was taken off the field on a cart.

Foster stepped on one of offensive lineman Tyler Catalina’s feet, his left leg landed wrong and he went down in obvious pain. His leg was stabilized before he was carted off to undergo an MRI exam and other tests.

“We’ll hope for the best right now until we get the results, but very concerning, for sure,” coach Jay Gruden said after the first day of organized team activities.

In other news:

• The NFL and the NFL Players Association agreed to form two new joint medical committees, one of which is to study the potential use of marijuana as a pain-management tool for players and review teams’ policies and practices for the use of prescription medication by players. The committees are to begin their work as soon as possible, league and union officials said. Any major policy changes still would have to be made through the traditional channels of the collective bargaining process between the NFL and NFLPA or via their annual negotiations over the terms of their jointly administered drug policies. But the committees are to provide recommendations and suggestions on key medical issues facing the league and its players.