Haynesworth left the team after his half brother died in a motorcycle accident in Nashville last week. Funeral services were held Tuesday.
Coach Mike Shanahan said McIntosh sustained a mild concussion during Sunday's win over Green Bay and had a headache Monday. The coach said he hopes McIntosh can practice Thursday or Friday.
Shanahan expects Williams to be able to practice Thursday. Williams reinjured his left knee against Green Bay.
Right tackle Jammal Brown also hurt his left knee against the Packers, but he practiced Wednesday.