There were several changes made by the San Francisco 49ers on defense for their Week 10 game with the Jacksonville Jaguars.

Chase Young's infusion into the defensive line rotation was understandably a huge story, while it became apparent early that starting slot cornerback Isaiah Oliver had been quietly benched.

But the adjustment that received the most attention both leading up to the game and its aftermath was the decision to bring defensive coordinator Steve Wilks down from the coaching booth to the sideline.

That move followed a worrying slump from a defense once again expected to be among the NFL's elite. The 49ers had given up 852 yards over the course of defeats to the Minnesota Vikings and Cincinnati Bengals, which followed a Week 6 loss to the Cleveland Browns.

Wilks was the subject of significant criticism following the Bengals defeat and, after discussion over the bye week, the decision was made to move him down to the field to be able to better communicate his adjustments to the linebackers, chiefly green dot wearer Fred Warner.

It's open for debate how much of an impact such a switch can have, but it's difficult to argue with the results from Sunday's 34-3 rout of the Jaguars that ended the 49ers' three-game losing streak.

Warner and Wilks' 'flawless' communication

A defensive front reinvigorated by both the bye and the addition of former second overall pick Young continually hounded Jaguars quarterback Trevor Lawrence, sacking him five times and forcing him into two interceptions and a fumble as part of four Jacksonville turnovers.

With the problem of the front being disconnected from the coverage seemingly solved and concerns about the predictability of the defense put to bed as Wilks threw a range of pressure looks at Lawrence, those playing behind the D-Line were similarly impressive, Warner an unsurprising standout with seven tackles and a fourth-quarter interception.

Afterwards, the All-Pro was emphatic in his assessment of how the new, and seemingly improved, workflow.

Asked about having Wilks on the sideline, Warner told his post-game press conference: "I guess that's the answer right there, huh?

"It was good. It was good having him down there, and the communication was flawless."

Back to 49er football

Overall, though, Warner did not feel too much of a difference from having Wilks up in the box, adding: "I think it was pretty similar, honestly. I think the thing was just kind of like us being — just going into it, we wanted to make sure the communication was good in terms of the microphone, him getting the calls to me, and I thought he did a great job.

"There's always going to be an adjustment period. I don't know if he's ever done it because I know he's always been in the box. I think he did a great job being down there today."

Where Warner could feel a clearly difference, however, was in the brand of football played on Sunday compared to what the Niners had put on tape over the previous three games.

"We had three games that just wasn't us," said Warner. 

"We had to get back to playing 49er football, especially on the defensive side. I've spoken on it. We had to take pride in what we were putting on tape, and today I feel like we did that."

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