Head coach Leslie Frazier said the Vikings don't want to risk a recurrence of Floyd's knee injury and thereby further thin their depth at defensive tackle.
"In light of what's going on with Kevin it probably wouldn't be wise to get him out there," Frazier said of Floyd. "He's close enough where he probably could get a few snaps, but just probably wouldn't be the smart thing to do."
Williams suffered a hyperextended knee and other damage on a low block by San Francisco 49ers offensive lineman Joe Looney Sunday night. Floyd had a "minor procedure" performed on his knee after suffering an injury in the preseason opener that was exacerbated in the second preseason game.
Floyd didn't play in the third preseason game, so if Williams isn't recovered in time of the opener, Floyd would get the start with only two preseason games of work and three weeks in between game action. It's not an ideal situation for a rookie.
"There's so many variables when it comes to playing as a rookie in the National Football League in comparison to the preseason. The fact that he's missed some time, it's going to be a challenge for sure," Frazier said. "We'll talk to him about it, some of the veterans will and some of the coaches will, about what's going to occur and the speed of the game, how different things will be on opening day. But there's nothing like experiencing it.
"He'll have to go through that process and learn from it and grow over that time. But the time he's missed will definitely affect some of the things he'll have to get done on that day."
The Vikings are also with another defensive tackle, Christian Ballard, who played in 33 percent of the defensive snaps last year. He left the team for personal reasons during training camp and hasn't returned.
At this point, depth is a concern at defensive tackle.
"When you have a question mark regarding a potential Hall of Famer like Kevin Williams, that creates some concern," Frazier said. "He's one of the best to ever play the game at his position. We're all hoping he'll be ready to go (for the opener), but it definitely creates some concern from a depth standpoint."
ROBINSON ‘MAKING PROGRESS'
CB Josh Robinson had some rough moments Sunday night against the San Francisco 49ers, giving up several receptions, including a touchdown to rookie Quinton Patton. Still, Frazier said the 2012 third-round pick is making progress.
To this point, Robinson has been the starter at left cornerback and moved inside to cover the slot receiver in the Vikings' nickel defense. Last year, he worked strictly as an outside cornerback.
"There's definitely some things that he'll have to get better at prior to that Detroit game. But like some of the other young guys on our team, he's playing a new position. There's going to some moments where he's got to learn from some of the mistakes that he might make," Frazier said. "But he's making progress. We've got to keep putting him in different situations to get him up to speed at that position. But we think he's more than capable of getting it done."
Tim Yotter is the publisher of Viking Update. Follow Viking Update on Twitter and discuss this story on our subscriber message board.