Roberts signed as an undrafted free agent with the Raiders on Thursday.
Analysis:
Roberts played four seasons for BYU and averaged 53 catches for 828 yards and five touchdowns over his final two campaigns. He has good height at 6-foot-4 but lacks vertical speed. Las Vegas has one of the league's least-established WR corps, so Roberts could compete for a roster spot as a depth wideout if he impresses in training camp.
