Joe Gibbs Racing capped 2015 with its first Sprint Cup championship in a decade. Then the team made some major changes to one of the strongest organizations in NASCAR.

Kyle Busch won his first Cup title, the first for manufacturer Toyota and the first for JGR since Tony Stewart's 2005 crown. Behind the scenes, though, personnel changes were being made even though JGR put all four of its drivers in the Chase for the Sprint Cup championship.

Dave Rogers was moved from crew chief for Denny Hamlin to crew chief for Carl Edwards, while Mike Wheeler was promoted from the Xfinity Series to replace Rogers. Busch and Matt Kenseth's teams were left intact.

JGR drivers combined to win 15 of 36 races last season.