The Facts: Coach Bruce Arians believes that the sickle-cell trait issue caused Brown from returning to Sunday's game against the Falcons.

Diehards Line:Brown initially was thought to have a hamstring injury, but appears that the sickle-cell trait issue is causing the problem. He was seen by specialists on Tuesday. His status for Week 13 in uncertain at this time. We will keep a close eye on this situation and update you as we hear it.