Brown left the Super Bowl with a concussion and will not return, according to CBS' broadcast of the game.
Brown suffered his injury in the third quarter and was ruled out for good early in the fourth. He finished with four catches for 80 yards on seven targets, highlighted by an impressive 42-yard reception over two defenders. Brown's absence leaves the team with just three wide receivers -- Ted Ginn, Devin Funchess and Jerricho Cotchery.
Okafor (calf) is listed as active Sunday at Seattle, Darren Urban of the Cardinals' official site reports.
Okafor's recovery from a strained right calf has encompassed three games and the Cardinals' bye week, but he'll again provide a boost to the front seven. In his career, he's displayed modest pass-rushing chops, notching 10 sacks in 19 career games.