Reader (quadriceps) was a limited participant for Friday's practice and is questionable for Detroit's Week 1 game against the Rams, Eric Woodyard of ESPN.com reports.
Reader is still in the late stages of his recovery from the quadriceps tear he suffered in Week 15 of last season. The 6-foot-3 defensive tackle has been a limited participant in each of the Lions' practices this week, so his status will likely be revealed Sunday morning.