The Seattle Seahawks have signed Pete Carroll to a contract extension through 2021.

The Seahawks clinched their seventh playoff berth in Carroll's ninth season with the team.

"This will continue the championship culture that we have created in Seattle," Jody Allen, the team's chair and trustee of the Paul G. Allen Trust, said in a statement.

Carroll is the oldest coach in the NFL at the age of 67.

Carroll's previous extension ran through the 2019 season.

"The organization has been exceedingly good to me throughout the whole time we've been here, and they've continued to take that position, and I couldn't be happier," Carroll said.