The Oakland Raiders have fired offensive coordinator Greg Knapp and three other assistants a day after finishing their 10th straight season without a playoff berth.

Coach Dennis Allen announced Monday that special teams coordinator Steve Hoffman, offensive line coach Frank Pollack and linebackers coach Johnny Holland also have been fired.

Allen says it was a difficult decision and he appreciated the contributions the four coaches made this past season.

After finishing 8-8 the past two seasons, the Raiders went just 4-12 in Allen's first season as head coach.