Reynolds (back) wasn't spotted at practice Thursday, Dave Birkett of the Detroit Free Press reports.
Reynolds was listed as limited Wednesday, so a downgrade in participation Thursday makes his status for Sunday's game against the Packers worth monitoring. Friday's injury report should help clarify his chances of suiting up this weekend, but if Reynolds ends up out, Amon-Ra St. Brown and Kalif Raymond would be in line to lead the Lions' Week 9 wideout corps.