McFadden, according to coach Hue Jackson, wasn't wearing a protective boot on his right foot Monday, but neither did he take the field for even light drills as the team got back from a weekend off following the Raiders' 24-17 win Thursday night in San Diego.
Wide receiver Jacoby Ford, another of Oakland's most explosive players, was wearing a boot on his left foot after an injury against the Chargers when he fell awkwardly following a 41-yard reception from Carson Palmer and did not return.
Jackson said he tries to keep injury information at arm's length until he hears a player might be on the verge of returning to action.
"I have a team to coach and I can't worry about all the injuries and those things," Jackson said. "We have a team of doctors that handle that. They're normally going to tell me when a guy can play and I trust their judgment and what they do. That's their job.
"I'm not a doctor. There are times when I want to know right away because as you start to build a game plan you need to know. Nobody's been ruled out as of now, so we'll go through the week and see where we're at."
McFadden was having a career season at the time of his injury with a then-NFL leading 614 yards rushing and a 5.4 yards per carry average. Should he miss the Minnesota game, it would be the fourth consecutive season that he has missed at least three or more games.
As a rookie out of Arkansas, McFadden had cases of turf toe on both feet that limited him to 13 games, five starts and 499 yards rushing and a 4.4 average yards per carry.
In his second season, McFadden played in 12 games – missing four because of in-season minor knee surgery and the finale with a knee injury – and averaged just 3.4 yards per carry with 104 carries for 357 yards.
Last season, McFadden missed two games with a hamstring strain in October and also missed the last game of the season with a leg injury, but had his best season with 1,157 yards rushing and a 5.2 average yards per carry.
"I know we're getting closer to getting him back out here," Jackson said. "I know he's working his tail off. When I saw him this morning he looked good. Until we get closer later on in the week and know exactly where he is, I don't want to speculate."
TRENDING: Want to know why coach Hue Jackson and defensive coordinator Chuck Bresnahan emphasize stopping the run? Oakland gave up 75 yards rushing to San Diego and has surrendered 69.6 yards per game on the ground in its five wins. In their four losses, the Raiders have given up 211.0 yards per game.
LINEUP WATCH: Stephon Heyer, a tackle during his time with the Redskins, started at left guard against San Diego and helped the Raiders gain 191 yards rushing while giving good protection to Carson Palmer. Heyer will remain at left guard if Stefen Wisniewski is needed at center against Minnesota because of Samson Satele's knee injury.