The Steelers have promoted cornerback Grant Mason from the practice squad to their 53-man roster as a replacement for safety Ryan Clark, who was placed on the injured reserve list with an inflamed spleen.

Clark was placed on IR yesterday with backup tight end Jerame Tuman, who has been bothered by a back injury most of the season. Tuman was replaced on the active roster by center Marvin Philip, a sixth-round draft choice in 2006.

In addition, former West Virginia safety Mike Lorello was added to the practice squad. Lorello was in training camp with the Steelers each of the past two seasons after signing as an undrafted free agent.

Mason, 24, signed with the Steelers in January after originally signing as an undrafted free agent from Michigan with the New Orleans Saints in 2006. Mason, though, did not play last season after being waived by the New Orleans Saints following training camp in September 2006.