PITTSBURGH -- Steelers safety Ryan Clark did not return with the team from Denver late Sunday night because of a spleen inflammation that occurred during the 31-28 loss to the Broncos.
Coach Mike Tomlin said Tuesday that Clark was not injured during the game, but had a pre-existing blood condition aggravated by dehydration and Denver's high altitude.
Clark is expected to play Sunday in Cincinnati, though he must first pass a series of medical tests later this week.
The Steelers will probably be without defensive end Aaron Smith, who sprained the medial collateral ligament in his left knee during the first quarter and was replaced by Nick Eason.
Smith is "doubtful, at best" for Sunday, Tomlin said.
Tight end Jerame Tuman (back) and cornerback Bryant McFadden (sprained ankle) could play Sunday after being out for two games each.
Copyright 2007 by The Associated Press