Defensive end Brian Robison and cornerback Antoine Winfield are both officially listed as questionable on the Vikings' injury report for this weekend. But it would take an awful lot to keep either veteran from playing in Sunday's high-stakes rivalry clash against Green Bay.

A win will push the Vikings into the postseason. And so Robison, dealing with a sprained right shoulder, and Winfield, with a broken bone in his right hand, both figure to suit up Sunday and play.

Robison missed last weekend's win in Houston, working back from a Grade 3 sprain of his acromioclavicular joint. He has been limited in practice all week but has shown signs of progress, leaving head coach Leslie Frazier optimistic about his availability.

"He's much improved," Frazier said Friday afternoon.

Robison knows what's at stake Sunday and will push to be in action. If the veteran end does play, the Vikings will keep a close eye on his activity and productivity with comfort that Everson Griffen provides a nice back-up plan.

Frazier said he would listen closely to how Robison feels about his shoulder discomfort and monitor his soreness on Saturday.

"I want to hear what he has to say," Frazier said.

Winfield broken the second metacarpal in his right hand in the first quarter last weekend and played the rest of the game with the injury; the fracture wasn't diagnosed until Monday morning. And while the 14th-year corner will need to play with a wrap and a protective pad on his right hand, that shouldn't limit him much.

"He showed me today that he can grip with it," Frazier said. "We feel like he'll be able to tackle and do what he has to do."

Those listed as probable on the Vikings' injury report are: Adrian Peterson (abdomen), Jared Allen (shoulder), Chris Kluwe (knee), Phil Loadholt (knee), Marcus Sherels (quadriceps), Marvin Mitchell (illness).