Oakland and Denver notes

ESPN’s Adam Schefter is reporting that the Raiders could release defensive tackle Gerard Warren and running back Justin Fargas in the coming days because they both have bonuses coming.

It wouldn’t be a shock. The Raiders are looking to upgrade their defense and Warren has been part of a struggling line since he was traded to Oakland from Denver in 2007.

Fargas could be expendable because Oakland wants to give running backs Michael Bush and Darren McFadden more playing time. Fargas had 491 yards and averaged 3.8 yards per carry last season.

Meanwhile, it is being reported that center Casey Wiegmann is visiting Washington. Wiegmann was cut by Denver last week because the Broncos want to get bigger on the line. If he signed with the Redskins, Wiegmann would be reunited with former Denver coach Mike Shanahan.