Holliday was injured in the first half of Sunday's loss to Oakland and didn't return.
Rodrique Wright, a 2006 seventh-round pick appearing in his first game as a Dolphin, got extensive playing time in the second half against the Raiders and might get his first NFL start Sunday at Houston.
Cameron said rookie Paul Soliai also would get more playing time.
The news was better when it comes to Channing Crowder, who also left the game in the first half because of an ankle injury. His injury was a sprain, and Cameron said it was too early to determine the extent.
Back to Williams, there's no timetable as to exactly when the NFL will rule on Williams' appeal and there's also no guarantee he'll be reinstated.
If he does get reinstated, the next issue would be what the Dolphins would do with him.