The NFL required the Indianapolis Colts to add veteran running back Ahmad Bradshaw to the active roster after he participated in a walk-through Aug. 4 according to a league spokesman.

Players on the physically unable to perform list are not allowed to participate in any practice sessions with their teammates even walk-throughs. They are limited to working with trainers and the rehabilitation staff until they gain medical clearance to practice. Bradshaw’s participation — described as mental reps by the Colts — was deemed a violation of league rules.

Bradshaw 27 signed a one-year contract with the Colts in June after a six-year career with the New York Giants. He underwent surgery on his right foot in January and opened training camp on PUP while continuing his rehab work.

Bradshaw was expected to be activated either this week or next before the NFL intervened.