The Raiders activated Waller (illness) from the reserve/COVID-19 list Wednesday.
Per Paul Gutierrez of ESPN.com the tight end -- who last suited up Week 12 on account of a knee injury -- was a limited participant in practice, the first time he's taken part in any on-field activity with his teammates since getting hurt. Waller is trending in the right direction as Sunday's regular season finale against the Chargers approaches, but he would presumably need to practice fully by Friday in order to avoid taking an injury designation into the weekend.