CHICAGO – Justin Jefferson ambled in a circle around the 25-yard line at Soldier Field, tossing a ball to himself to keep busy and offering fist bumps to the teammates who would try to take his inimitable place in the Vikings offense. It was the first day of a strange new routine that will last for at least four weeks, because of the right hamstring injury that put Jefferson on injured reserve and forced the Vikings to do without him for the first time since that night in April 2020, when former General Manager Rick Spielman laughed to himself in disbelief the Eagles had left Jefferson available to the Vikings with the 22nd pick in the draft.