Tucker is about getting results now, which explains why he is not burning down the Cover-2 bridge and why he is learning a new language instead of asking all the returning defenders to conform to his.
"It's important to be able to hit the ground running," he said. "I've done 4-3, I've done 3-4. You want to look at the group of guys you have and say, 'How can I get this group up and running as fast as possible?'
"It's not about me; it's about what these players can do right now. These guys were playing at a fairly high level in the scheme they were playing. We need to get better obviously.
"But it would be more effective for me to learn their terminology than for me to scrap everything they have done and bring in something that is totally new. Quite frankly, it's really just terminology. There is a lot of carry-over from what I've done in Jacksonville and other places and what they have done here. … What I want to do is take a look at it, evaluate it and see how we can take it farther."
Tucker is the most important assistant on Trestman's staff in the same way Terry Shea, Ron Turner, Mike Martz and Mike Tice were the most important assistants on Lovie Smith's staffs when they were his offensive coordinators.
He might have the most difficult job of all the Bears assistants. Certainly, the bar is set higher for him than it is for anyone else on staff.
Yet he is changing neither himself nor his defense in an attempt to make everything fit. He's just letting it flow.
That's because Tucker isn't coming to Chicago with the idea of using the Bears defense as a springboard to become a head coach.
Which is precisely why it could work out that way.