Washington Redskins wide receiver Charlie Brown has a sore right hamstring and odds are only "50-50" he will play Sunday against the Los Angeles Raiders, said team spokesman Charlie Taylor.

Brown, who strained the muscle July 29 and missed several days of practice, skipped today's morning workout at Dickinson College in Carlisle, Pa., before the team flight to Los Angeles. The hamstring apparently has been bothering him for the past several days.

Meanwhile, it's up to left cornerback Darrell Green (sprained right ankle) whether or not he will play. When asked about it, Green laughed and said, "I'm going to run a marathon Sunday in Virginia."

How do you tell the McKenzie brothers apart?

Raleigh, the Redskins' impressive rookie offensive guard, today will face his twin brother, Reggie, a rookie linebacker for the Raiders. They played together at Tennessee before the NFL draft separated them. Raleigh was an 11th-round draft choice and Reggie a 10th-round pick.

But they still have a lot in common, including their uniform number. They both will wear 94.

"I know him so well that I can count on one thing," Reggie told the Los Angeles Herald Examiner. "Raleigh will try to cheap-shot me at least once."

Seventy-seven players made the trip from Harrisburg, Pa. Ironically, two new tight ends who were brought in to add depth to a depleted position stayed behind with injuries: Ron Egloff (finger) and David Hersey (hamstring). Among those who were left behind are wide receivers Mark McGrath (thigh) and Calvin Muhammad (finger), and rookie running back Lionel Vital (hamstring) . . . The Redskins released tight end Keith Smith, a rookie free agent from Texas-El Paso who missed most of training camp with a sprained left ankle.