Butler was listed on New England's injury report with an illness this week, but he was a full participant in Thursday's practice.
"Weird moment, it was a weird situation," Butler told reporters on Thursday. "I don't think I've ever been through that before. I've always been here for my team, but I had a great day of practice, was limited a little bit, but I'm more than glad to be back out there."
The Patriots have used their fourth-year cornerback on special teams against the Eagles. He appeared in all 16 games during the regular season and tied for second on the team with two interceptions.