Pittsburgh Steelers 07/30/2007 3:06 PMAP reports the Pittsburgh Steelers released rookie WR Chris Jackson on Monday. Jackson, who played at MillsapsCollege in Jackson, Miss., was signed in April as an undrafted free agent. The Steelers replaced Jackson on their roster by re-signing first-year WR Gerran Walker. Walker originally signed with the team in January, but was released in July.Read more