Denver Broncos right guard Chris Kuper once again took limited reps in Friday's practice and has been listed as doubtful for Sunday's game against the Oakland Raiders.
Kuper has been bothered by a forearm issue, and was limited in practice on both Wednesday and Thursday.
In addition, linebacker Nate Irving (concussion) and Matt Willis (hamstring) were deemed questionable as both returned to practice on Friday but also took limited reps.
Safety Quinton Carter did not practice all week and has been ruled out for this AFC West clash.
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