Ability has never been an issue for Vikings defensive tackle Sharrif Floyd. As for durability, well …
On the heels of last Sunday's standout game, the former first-round draft pick missed his third straight day of practice Friday and was ruled out of Sunday's game at Detroit because of knee and ankle injuries. Backup Tom Johnson, the team's inside pass rusher in the nickel package, will start.
"I think Tom's played good all year, really," Vikings coach Mike Zimmer said. "He did a great job in the preseason and has done a good job all year. I think we should be fine."
Johnson, who had a career-high 6½ sacks a year ago, has played 187 of the 348 defensive snaps (53.7 percent) this season and has one sack and two tackles for loss. Floyd has started the first five games and has played 226 snaps (64.9 percent).
In his first two seasons, Floyd's play was affected for long stretches by nagging injuries. He missed two games and five starts a year ago but appeared to be healthy for the first five games of this season.
In last week's 16-10 win over the Chiefs, Floyd was a consistent force and also made two of the bigger plays in the game. He notched half a sack and also broke through the offensive line to make the tackle for no gain on fourth-and-1 at the Vikings 7-yard line.
There was no mention of the injury Sunday.
Trattou out again
Defensive end Justin Trattou, who hasn't played since Week 3 because of a foot injury, was listed as out.