A longtime assistant coach in the National Football League (NFL), he served as the offensive coordinator for the Seattle Seahawks from 2000 to 2008.
He began his career in the NFL as a ball boy with the San Francisco 49ers while his uncle, William O'Grady, was a part owner of the franchise.
[2] Haskell then left for University of Southern California (USC), spending five seasons there as an assistant coach.
When Holmgren left Green Bay for the Seattle Seahawks in 1998, Haskell accepted the offensive coordinator position with the Carolina Panthers.
On February 10, 2010, the Cleveland Browns announced that Haskell as the senior advisor to president Mike Holmgren.