The Vikings returned to their outdoor practice fields Wednesday just days in advance of Saturday's kickoff in Green Bay.

They did so without running back Adrian Peterson (knee/groin), receiver Stefon Diggs (hip) and safety Harrison Smith (ankle). Peterson returned to action Sunday for the first time since suffering a knee injury in Week 2. He played 12 snaps.

Vikings head coach Mike Zimmer said Wednesday that Peterson didn't look quite fully healthy against the Colts.

Smith took part in some warmups with teammates, a good sign as he's been held out due to a sprained ankle since the Dec. 1 loss against Dallas.

The Vikings also were without guard Brandon Fusco (concussion) and receiver Laquon Treadwell (ankle). They'll get a chance to practice Thursday before Saturday's game at Lambeau Field.

They have three players in the concussion protocol, including cornerback Trae Waynes and fullback Zach Line. Both were listed as limited during Wednesday's practice.