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Richard Marshall out (again) this week

Cornerback Richard Marshall is not playing on Sunday against the St. Louis Rams, according to a source.

That should not surprise anyone considering he didn't practice Friday ... or Thursday ... or Wednesday. He didn't play last week. He didn't practice last Friday ... or Thursday ... or Wednesday. And not only has he not practiced, he's not been seen near the field because he's either been getting treatment for a back injury or seeing a doctor about this issue.

The Dolphins hope Marshall might be able to contribute after the coming bye week. But even that is uncertain.

Nolan Carroll, who had a good game in Marshall's absence last week, is also nursing an injury but he is expected to start again despite a sore Achilles.

On another injury front, it is also looks doubtful running back Daniel Thomas will play Sunday against St. Louis but I am only speculating on this one. He's been nursing his second concussion in four games this season. He missed the Oakland game after his first concussion, suffered at Houston.

Again, the club is hopeful Thomas will be cleared and able to play following the bye week.

The Dolphins will release their injury report later today.