Losing Bush, who was knocked out of last week's game against the Jets, would be a huge blow for the Dolphins, since he's been instrumental in keeping some of the pressure off of rookie QB Ryan Tannehill. Bush has 302 yards and 2 TD's with a whopping 6.0 yards per carry in 2012.
The 3-0 Cardinals, meanwhile, have an even lengthier list of players being held out of practice, most notably starting DT Darnell Dockett (hamstring) and TE Todd Heap (knee).
Arizona has already placed starting RB Beanie Wells on IR this week with a turf toe injury.
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