Cornerback Don Burrell suffered cartilage damage to his left knee during the Washington Federals' morning practice today.

Burrell, the USFL team's first serious injury, will undergo arthroscopic surgery Friday and probably will be out for two to three weeks. Burrell, 26, of Mississippi State, played the last two years under Federals Coach Ray Jauch with Winnipeg in the Canadian Football League.

Rod Caldwell, a territorial pick from the University of Maryland, was switched from defensive tackle to offensive tackle.

Chris Garrity of William and Mary, one of five quarterbacks in camp, resumed workouts after reporting with a slight fracture in his right ankle. Kim McQuilken, formerly of the Washington Redskins and Atlanta Falcons, is vying with rookie Mike Hohensee of Minnesota for the starting quarterback job. The other quarterbacks are Mike Nott, who played four years in the CFL with British Columbia, and Mike Forslund of Liberty Baptist.

The Federals will have a controlled scrimmage with the Birmingham Stallions in the Gator Bowl Wednesday at 4 p.m. The Federals will play a more formal scrimmage at the Gator Bowl against the Tampa Bay Bandits Saturday at 8 p.m.

The Federals will break camp Feb. 27, and will open their 18-game season March 6 at RFK Stadium against the Chicago Blitz.

Because of the snow, the Federals have extended through Saturday the time for customers to pick up season tickets at the RFK Stadium box office. Single-game tickets will go on sale today as scheduled.