Witherspoon signed with the Rams' practice squad Wednesday.
Witherspoon's return to LA won't include an immediate spot on their 53-man roster. Considering he remained a free agent throughout training camp, the Colorado product will likely need some time to prove he's ready to compete on Sundays. However, once he does so, he'll likely have the opportunity to move to the active roster and bolster the Rams' depth in the secondary.