Nearly 24 hours from the start of free agency, the only addition to the Bulls we're sure about is Tom Thibodeau. A lot of things about the Bulls still depends on where LeBron James, Chris Bosh, Joe Johnson, etc. decide to play; however, one thing that won't matter is how Thibodeau will teach defense.

NBA Playbook, the best blog/website that focuses on playcalling in the NBA that I've come across, looked at Thibodeau's defensive philosophy at great depth on Monday. Specifically, how the Celtics defend the pick and roll; therefore, how the Bulls will defend the pick and roll.

Important to know going into the screen-by-screen and video breakdown of the Celtics' defense is that the Bulls were as good or better than the Celtics at defending the pick and roll last season. Where the difference is, is in the turnover rates; and what Sebastian Pruiti, who writes NBA Playbook and NetsAreScorching, thinks is that Thibodeau should help the Bulls develop the trust it takes to go for turnovers, like the Celtics did.

"You know how much trust it takes to just leave your man and go double the basketball (or make a play to get the steal)? I think that is an important factor of Thibodeau's defense last year. Sure, the strategy is great, but he got his players to trust their teammates and believe in the system, and that is a large part of the reason it worked as well."

While the people running the defense is important, so is how Thibodeau coaches it and how the players accept it. 

Now, while you wait for free agency to begin, go check out the post.

Erick is a contributor to i94 Sports. You can find his daily thoughts at his site Outside the Clubhouse.