The move saves Las Vegas $8.272 million in cap space. Littleton just signed with the Raiders in free agency this past spring on a three-year, $36 million deal.
Littleton, 26, is a former undrafted free agent out of Washington signed by the Rams in 2016. He played out the final year of his three-year, $1,635 million contract before returning to the Rams last year on a one-year restricted deal worth $3,095,000.
The Raiders signed him as an unrestricted free agent this past March.
In 2019, Littleton appeared in all 16 games for the Rams and recorded 134 tackles, 3.5 sacks, two interceptions, two forced fumbles, four recoveries, and nine pass defenses.