Didn't meet fitness standards
Raiders offensive coordinator Greg Olson said the team let Warren go Sunday because he didn't meet Oakland's "fitness expectations," Josh Schrock of NBC Sports Bay Area reports.
Waived by Oakland
Warren was let go by the Raiders on Sunday, Michael Gehlken of the Las Vegas Review-Journal reports.
Approaching 260 pounds
Warren is up to around 260 pounds, Scott Bair of NBC Sports Bay Area reports.