The Jacksonville Jaguars need to do two things to win. Those two things are: play physical defense, and establish a strong rushing offense.
Perhaps there is no better of a coach for a physical defensive playcalling team than Jack Del Rio. Del Rio is a defensive-minded NFL coach that has proved in the past that his style of coaching is both a winning style and a style that other teams want to steal.
By using the term "steal," I am simply referring to the fact that it was the Jaguars who truthfully began using the two running back system consisting of Fred Taylor and Maurice Jones-Drew.
Not to say that other teams did not use two running backs, but the Jaguars were the first to use the one-two combo of a bigger back in Taylor and a small, speedy back in Jones-Drew.
Del Rio has a great understanding of physical football, the question is whether or not the Jaguars can play that way with their current roster. Without Taylor, the Jaguars only have one running back that will be able to consistently play at a high level.
Defensively, the Jaguars have a good squad, but the inexperience of some starters may hurt them this season.
Stuffing the run and rushing the passer are the two main elements to Del Rio's physical defense, and hopefully he can mold some of the young talent into great players who fit his defense.