Most of the starters will sit tonight as the Steelers open their preseason schedule against the Detroit Lions at Heinz Field.  Airtime on WBVP-WMBA is 5pm. The kickoff is at 7.  When Heath Miller retired earlier this year, the Steelers signed free agent tight end Ladarius Green from San Diego.  Green had off season ankle surgery. That was healed  when training camp started.  He has yet to practice because of persistent head aches. He is in the Steelers concussion protocol.  Green signed a four year 20-million dollar contract a month after Miller retired. He told them about his ankle surgery but, sources say they never discussed his concussion problem.