The defensive line has dominated the conversation surrounding the San Francisco 49ers offseason. Acquiring Dee Ford via trade with the Kansas City Chiefs and subsequently drafting Nick Bosa with the second-overall pick has everyone eager to see the 49ers revamped pass rush.

Just how many sacks will Ford and Bosa rack up in 2019? How will their presence benefit DeForest Buckner and other inside rushers? Will that trio provide a noticeable benefit for the secondary?

Those questions, to varying degrees, will determine much of San Francisco's overall success in the upcoming season. That's why there's such a keen interest in new defensive line coach Kris Kocurek. John Lynch has said he expects the group to be a "dominant force" in 2019. The 49ers tasked Kocurek with making that a reality.

The high-energy coach said he wants his guys to play "with their hair on fire."

"Aggressive (and) physical," Kocurek said of his goals for the d-line. "A group where you see four defensive linemen on the field pursuing the ball wherever it's at on the field. (We're) trying to be the hardest playing position group in the National Football League. That's what we strive for every single day."

San Francisco will deploy more (but not exclusively) wide-9 defensive fronts in 2019. That's been the key catchphrase of the offseason, and it essentially means there will be more spacing between each defensive lineman. A 9-tech defensive end plays outside the tight end, opposed to last year when the 49ers ends lined up outside the tackle (5- or 6-tech).

Kocurek has always utilized this front because of the benefit it offers against the run and pass.