New Bears coach Marc Trestman is widely known for his work with quarterbacks.
But it's emphasis on protecting them that has been a key to their success.
In 2007, the Montreal Alouettes gave up 68 sacks on 625 passes attempts. Trestman took over as head coach in 2008 and, largely with the same group of players, reduced the number of sacks to 22 on 712 pass attempts. 
"We heard he had NFL experience, but we weren't too sure about him," said Ryan Karhut, an offensive lineman on the Alouettes. "But he understands football on a whole other level.
"It was neat to hear him talk and break things down."
At training camp before the 2008 season, Trestman emphasized two principles, Karhut said: protect the quarterback and get after the opponent's quarterback.
"It's a huge part of football," Karhut said, "and he made it a massive part of our team at the time."
The Alouettes were 8-8 in 2007, but they headed to the Grey Cup in Trestman's first season. They lost that game, though. Karhut suffered an injury early in the 2009 season, and he was released. The Alouettes won the the first of back-to-back championships that season.
"He's a difference maker for all the right reasons," said Karhut, now the head coach of the Winnipeg Rifles, a junior football team. "He's all about football, and he cares. A lot of people say they care about football, but he truly cares, and it shows every day."
Karhut spoke to me Monday and said Jay Cutler would thrive under Trestman.
"If [Trestman] gets that job, pick Jay Cutler in fantasy football," Karhut said.
How did the line do after 2007? And how many new linmen had started and how many have been drafted since Trestman took over? Like Bourke was a new guy. Florry was a star linmen in the CFL. How many sacks did they give up in 2005 and 2006? How many each year after 2008?
Montreal does draft linmen, they even draft interior linmen high. Good luck convincing the Bears to do that.
I could not agree more that the primary keys in today's modern football era are protecting the quarterback and getting after the opposing team's quarterback. Special teams would be another area I would add.
The most fundamental part of any offense is blocking. On pass plays, that means protecting the QB. Saying that Trestman emphasizes protecting the QB and getting to the opposing one is like saying that a math teacher emphasizes knowing how to add. Aaron Rogers aside, if you don't protect your QB, you have no passing offense. I don't understand the point of this post.