Four years ago, Mike Moon was hired to Notre Dame's defensive staff by then-coordinator Marcus Freeman and ex-defensive line coach Mike Elston. But Moon quickly became a key cog in the Fighting Irish's Al Golden-led defense, proving his coaching versatility by roles that assisted with the coaching of Notre Dame's defensive line and linebackers.

The Irish, fresh off losing a national title game to the Buckeyes, reportedly hired defensive coordinator Chris Ash on Wednesday. The deal is expected to be finalized shortly.

Chris Ash has accepted the job of defensive coordinator at Notre Dame, sources told ESPN. It will be his fifth coordinator job at a power conference program.