Gibbs had a three-driver team this year:
Next year Gibbs is adding a fourth driver to its Toyota team,
Gibbs said Dave Rogers would shift from Busch's No. 18 car to become crew chief of Hamlin's No. 11 car.
Darian Grubb, who had been Hamlin's crew chief, now takes over those duties for Edwards' No. 19 Toyota.
Adam Stevens, who spent the last four seasons as a crew chief for Gibbs in NASCAR's second-level Nationwide Series, becomes Busch's new crew chief.
Jason Ratcliff remains crew chief for Kenseth's No. 20 car.
With the addition of Edwards, "we have been able to take a step back and evaluate each of our teams and make decisions that we feel are best for our organization long-term," Gibbs President J.D. Gibbs said in a statement.