After failing to make the Raiders' 53-man roster at the end of training camp, Guyton signed with Las Vegas on the practice squad Wednesday.
The Raiders activated Guyton (undisclosed) off their active/PUP list Monday, Aaron Wilson of KPRC 2 Houston reports.
The Raiders signed Guyton to a contract Monday, Jeremy Fowler of ESPN.com reports.
Guyton (coach's decision) is inactive for Sunday's game against the Chiefs.
Guyton caught both of his targets for 19 yards in the 63-21 loss to the Raiders on Thursday.
Guyton brought in his sole target for eight yards in Sunday's 24-7 loss to the Broncos.
Guyton caught one of his three targets for five yards in Sunday's 6-0 victory over the Patriots.
Guyton recorded one catch for four yards in Sunday's 20-10 loss to the Ravens.
Guyton (groin) is officially active for Sunday's home game against the Ravens.
Guyton (groin) is expected to suit up for Sunday's game against the Ravens, Adam Schefter of ESPN reports.