Roberson signed with the Rams' practice squad Tuesday, Cameron DaSilva of Rams Wire reports.
Roberson was cut from the Bills' practice squad Oct. 11, but he'll now have a new opportunity in Los Angeles. The 24-year-old will give the Rams another potential option at wide receiver after the team placed Allen Robinson (foot) on IR on Tuesday. However, he'll have to prove he deserves a spot on the 53-man roster first.