Reed spent the offseason recovering from arthroscopic hip surgery he had in April to repair a torn labrum. He did part of his rehabilitation in Houston, part of it in Atlanta and visited his surgeon, Dr. Marc Philippon, in Vail, Colo., last week.
Reed first returned to the field Monday but only participated in individual drills, according to people who were at practice.
"He's been getting a little work in the team run and the pass a little bit," Texans cornerback Kareem Jackson said.
"He looks pretty good out there. You can kind of tell he's not entirely 100 percent, but you know he's working to get back to 100 percent. He's going in the right direction and hopefully he'll be there soon."
Coach Gary Kubiak has said he would leave the decision to Reed as to whether he should play in Monday night's opener against the San Diego Chargers (10:15 p.m. ET, ESPN).
ESPN NFL Insider Ed Werder contributed to this report.