Norris hasn't appeared at the portions of practice open to the media since summer camp started, Evan Woodbery of MLive.com reports.
Due to privacy issues, the club hasn't commented on the absences of Norris, Tarik Skubal or Alex Faedo, all of whom have yet to report. It's unclear when the pitchers will be able to join the team. Norris is projected to work as the Tigers' fifth starter to begin the season.