The Raiders fired offensive coordinator Greg Knapp, special-teams coordinator Steve Hoffman, offensive line coach Frank Pollack and linebackers coach Johnny Holland, the team announced Monday.
"Decisions like this are very difficult," head coach Dennis Allen said. "I have a great deal of respect for all of these men and I appreciate their contributions to the Oakland Raiders this season."
The Raiders finished with a 4-12 record in 2012 and the offense ranked 18th in the NFL. Knapp joined Oakland this past offseason after having success with the Texans the previous two seasons, but the run game struggled mightily in his zone-blocking system, finishing 28th in rushing yards per game.