Haynesworth is unhappy with the prospect of playing nose tackle in the team's switch to a 3-4 defense. He has also chosen to do his offseason conditioning workouts away from Redskins Park, a move that displeased Shanahan.
The Redskins have explored trades with several teams for Haynesworth. If they are going to make a deal, they would like to have it in place before next week's draft.
The same goes for Campbell, who was pushed down the quarterbacks depth chart when the Redskins traded for Donovan McNabb earlier this month. Shanahan has said he would welcome Campbell back to the team, but Campbell wants to find a club that would give him a genuine chance to compete for a starting job.
Also absent from the three-day minicamp is linebacker Rocky McIntosh, who is unhappy about his contract situation. McIntosh indicated to The Washington Post that he might be on the trading block as well.
Attendance at the minicamp is voluntary under NFL rules. The Redskins are allowed three minicamps this offseason instead of one because they have a new coach, but only the one held in June will be mandatory.
Friday marked the first practice run by Shanahan since replacing fired coach Jim Zorn in January, and it was also the first practice in a Redskins uniform for McNabb, acquired in a trade with the Philadelphia Eagles.
There were no neutral parties allowed to witness the start of the new era, however. Shanahan decreed the practice and the players to be off-limits to reporters, which he is allowed to do because the minicamp is considered voluntary. Reporters will be allowed to watch the final practice Sunday.