NBA Power Rankings: Bulls take a turn at No. 1

It's not just Derrick Rose and his MVP numbers that have the Chicago Bulls holding court in this week's NBA Power Rankings - it's the Bulls' stingy defence, too. Which other teams are in the chase for the top and who is buried in the bottom?
Don't look now, but Derrick Rose, left, and the Chicago Bulls have vaulted into first place in this week's NBA Power Rankings. As for Al Jefferson, right, and the Utah Jazz? They're halfway down at No. 15. ((Jonathan Daniel/Getty Images) )

Each week,'s Lance Winn breaks down the balance of power in the National Basketball Association.