Brown (concussion) has been ruled out for the remainder of Sunday's contest against the Steelers, Ralph Vacchiano of Fox Sports reports.
Brown suffered a blow to the head on the game's opening play and was evaluated for a concussion. It's unclear whether he was diagnosed with a concussion, but his day has come to an end regardless. Brown's impact is primarily on special teams, so his absence won't cause any major issues for Philadelphia's defense.