ASHBURN, Va. (AP) -Wide receiver Devin Thomas, the Redskins' top draft pick, has been carted away from practice after pulling his right hamstring at training camp.

Coach Jim Zorn says the team doesn't immediately know the extent of the injury.

Thomas was hurt Thursday while reaching over his head to catch a pass from quarterback Jason Campbell during 11-on-11 drills.

Thomas was drafted in the second round, 34th overall, and signed a $4.83 million, four-year contract last week.

Also Thursday, defensive end Chris Wilson strained a calf muscle during drills.