Transitioning from the Canadian Football League to the NFL is going to create a learning curve. For new Chicago Bears head coach Marc Trestman, who spent the past five years with the Montreal Alouettes, his research will begin with a history lesson on his team's rivalry with the Green Bay Packers.

"I'm not as familiar (with the rivalry) as I'm going to be down the road," Trestman said Thursday in a media session at the NFL Scouting Combine. "Certainly I recognize there's a rivalry in Chicago and that's important. But we have to treat every team we're playing with the utmost respect. There's difference-makers on every team, as we all know, without going into names. We all know that. With every game, you try to neutralize the difference-makers first. Each team has that.

"It's a highly competitive division and a highly competitive league, and everything starts in your division. You're not going to play your division harder than you're going to play teams outside your division. That would be disrespecting the game completely. We've got to go and treat every opponent on an individual basis, go in there with respecting them to the max and knowing that the most important game we're going to play every week is that game. That's not new. That's the reality."

Trestman spent some time in the NFC North earlier in his coaching career. He was the running backs coach for the Minnesota Vikings in 1985 and later was the team's quarterbacks coach from 1990-91. Trestman also was the Detroit Lions quarterbacks coach in 1997.

Considering Trestman twice referred to playing in the NFL as being "south of the border," the adjustment back to the big leagues likely won't happen overnight. His approach, though, is markedly different from that of his predecessor, Lovie Smith, who, upon being hired in 2004, immediately said his team's No. 1 goal would be to beat the Packers. Smith finished his nine seasons in Chicago with an 8-11 record against the Packers, including a loss in the NFC championship game after the 2010 season.