Dennis Allen appears to be safe

Despite differences with ownership about contract length for his assistants, Dennis Allen appears to be keeping his job as head coach of the Oakland Raiders, sources tell ESPN's John Clayton.

Allen met Tuesday evening with Raiders owner Mark Davis, sources confirmed to ESPN.

As Allen left the Raiders facility Tuesday evening, he told reporters he had nothing for them and said he was done for the night.

Earlier Tuesday, at least a half-dozen assistant coaches accepted one-year contracts, one source told Clayton. Allen was pushing for his assistants to get two-year deals, to match the length of his contract, which expires in 2015.

At the beginning of the week, only two of Allen's assistants -- offensive coordinator Greg Olson and linebackers coach Bob Sanders -- had contracts beyond 2013.

Billed as a defensive-minded coach, Allen has been unable to significantly elevate Oakland's defense. The Raiders finished 18th in total defense in 2012 and 22nd this season.

The 41-year-old Allen, who served as the Denver Broncos' defensive coordinator before coming to Oakland, is the Raiders' eighth head coach in the past 13 seasons.

The Raiders have not had a winning season since 2002, when they went to the Super Bowl under Bill Callahan.

ESPN.com's Paul Gutierrez contributed to this report.