http://espn.go.com/blog/afceast/post...ast-injuries-3Miami Dolphins: The Dolphins continue to have concussion issues with running back Daniel Thomas, who missed practice on Wednesday and Thursday. This is a concern, considering he’s suffered two concussions already this season. Look for Miami rookie running back Lamar Miller to get increased playing time Sunday against the St. Louis Rams. Cornerback Richard Marshall also missed his second straight practice with a back injury. His chances look slim to play on Sunday. Dolphins starting running back Reggie Bush (knee) and defensive back Nolan Carroll (Achilles) practiced in a limited role Thursday.