The Raiders also signed OT Kamaal Seymour.
Doss, 24, wound up signing on with the Raiders as an undrafted free agent out of UC Davis. He agreed to a three-year, $1.755 million contract with the Raiders, but was later cut loose coming out of the preseason.
The Jaguars signed Doss to their practice squad before the Raiders added him to their active roster a few weeks into the regular season.
In 2019, Doss appeared in 14 games for the Raiders and caught 11 passes for 133 yards receiving and no touchdowns.
During his college career at UC Davis, Doss caught 321 passes for 4,069 yards receiving and 28 touchdowns over the course of four seasons and 44 games.