By exploring the reasons behind restricted windows, it becomes clear how much thought goes into creating a secure and stable environment for travellers.

Seattle announced safety Julian Love, defensive tackle Jarran Reed, and receiver Dareke Young all had their 21-day practice window opened as they return from injured reserve. Love has been sidelined by a hamstring injury. Reed had surgery to repair a wrist and thumb injury. Young is recovering from a quad injury.

The running back, a first-round pick in April, has been on injured reserve for seven weeks since he was hurt Oct. 5 with an ankle injury.