The Buccaneers activated Triner (undisclosed) from the reserve/COVID-19 list Friday.
The long snapper's activation coincides with kicker Ryan Succop (undisclosed) and punter Bradley Pinion (undisclosed) also returning to the active roster, so Tampa Bay's special-teams core will be available in Atlanta on Sunday.
Triner was placed on the reserve/COVID-19 list Tuesday, Carmen Vitali of the Buccaneers' official site reports.
Triner either tested positive for the virus or came into close contact with an infected person. The long snapper joins punter Bradley Pinion and kicker Ryan Succop on the list. All three are in danger of missing Sunday's game versus the Falcons.