Sean McDermott is confident the Buffalo Bills will make a deep playoff run in the near future.

The Bills are 73-41 in the regular season under McDermott, but they've failed to make it past the Kansas City Chiefs or Cincinnati Bengals in the playoffs over the last five seasons.

"It's not a matter of if. It's just a matter of when," McDermott said. "That is the relentless pursuit."

The Seahawks plan to hire former Buffalo Bills defensive coordinator Leslie Frazier as their assistant head coach, a source confirmed to ESPN on Friday.

Frazier becomes the first assistant known to be hired to Mike Macdonald's staff. The two will reunite in Seattle after coaching together with the Baltimore Ravens in 2016, when Macdonald had the title of defensive assistant and Frazier was the secondary coach.