Warren was let go by the Raiders on Sunday, Michael Gehlken of the Las Vegas Review-Journal reports.
Warren had such promise heading into the offseason, as general manager Mike Mayock even said he was excited to see the young running back in practice. Warren made a bid for the 53-man roster as an undrafted rookie in 2018 after he led the NFL with 292 rushing yards during the preseason, ultimately being stashed on injured reserve with a knee injury instead. In a corresponding move, the team signed fellow running back James Butler.