Couplin, who made Detroit's initial 53-man roster, was cut by the Lions on Oct. 20 -- the day they left for London -- but was re-signed to their practice squad and flown over the Atlantic Ocean two days later to join the team. He was promoted that Saturday when defensive lineman C.J. Mosley was suspended.
When Mosley returned and Detroit needed to make room for Kyle Van Noy and Andre Fluellen, the Lions waived Couplin again and he was picked up by the Buffalo Bills. He was waived Monday by Buffalo after eight days with the club, cleared waivers Tuesday and re-signed with the Lions practice squad Wednesday.
To make room for Couplin, Detroit waived receiver Patrick Edwards from the practice squad.