Alan Williams, defensive coordinator of the Minnesota Vikings, said the Detroit Lions have "narrowed down" their offensive menu over the past few weeks.

"They've streamlined what they're doing," Williams said. "Not a lot of formations like we saw last time [in Week 4]. They are sticking to a package and doing that well."

But the Lions have not become conservative. Matthew Stafford has nine attempts that have traveled at least 21 yards in the air over the past three weeks.

The Lions are simply running a wide array of plays with the same personnel packages.