According to multiple sources, Oakland Raiders new head coach Dennis Allen has be signed to a four-year contract with the Silver and Black, though the particulars of the agreement remain unknown at this point.

Per San Jose Mercury News’ Tim Kawakami on Twitter:

AP is reporting Dennis Allen got a 4-year deal. If that’s 4 years guaranteed, that’s a big departurel for the Raiders.

— Tim Kawakami (@timkawakami) January 27, 2012

Allen, 39 led the Broncos as first year DC from a league-worst 29.4 points and 390.8 yards per game in 2011 to ranking 20th in yards (357.8) and 24th in points (24.4). He spent five years as a defensive assistant in New Orleans and Atlanta.

Allen will be the first Raiders head coach to come from a defensive background since John Madden way back when in 1969.

For more on hte Silver and Black, head over to Silver and Black Pride.