ENGLEWOOD, Colo. --Four days after suffering a concussion on the last play of the first half in San Diego, TE Vernon Davis was back on the field on as the Broncos continued their preparations for this weekend's game against the Oakland Raiders.
Davis has been in the league-mandated post-concussion protocol since the hit, and was not at practice Wednesday.
"He's still got to get the full clearance [through the protocol], but he was able to return today," Head Coach Gary Kubiak.
As Davis returned, ILB Danny Trevathan remained out because of the concussion he suffered against the Chargers. Davis is "a step ahead" of Trevathan in the process, Kubiak said.
As was the case Wednesday, the Broncos worked without helmets, a concession to the wear and tear that has accumulated and left the team with 21 players listed on the Wednesday injury report.
"Our work was good today," Kubiak said. "Obviously, we're not in our pads and stuff like we [normally] are on Thursday, but our reps were good. I think we're having a good week. We've just got to see what takes place over the next 48 hours."
... Trevathan, OLB Shane Ray (illness), QB Peyton Manning (plantar fascia tear) and safety T.J. Ward (ankle) were the only Broncos not at Thursday's practice. Ray was sent home after a visit to a doctor after he became ill in the morning; Kubiak said he believed Ray had "something going on with his throat."
... NT Sylvester Williams worked on a limited basis for a second consecutive day. "My expectations are for Sly to be ready to go based on what I've seen the last two days," Kubiak said.
... Safeties David Bruton Jr. (knee) and Omar Bolden (hamstring) were at practice, but watched from the sideline.
... Running backs C.J. Anderson (ankle) and Ronnie Hillman (foot) were also on hand, but did not practice. Hillman did "a little bit" of work in the walk-through period before practice began, Kubiak said.
"The expectations are for [Hillman] and C.J. to be full participants [Friday]. We'll see," Kubiak said, adding that if both fared well Friday, they would be in position to play Sunday.
"They're both making up ground," Kubiak said. "We picked up the tempo a little bit today from yesterday. We're trying to get those guys to Friday right now."
... Manning threw for a second consecutive day, with a similar session to the half-hour one he he had Wednesday.
"It's the same routine the rest of the week," Kubiak said, adding that Manning "came out fine" from his Wednesday work.
The Broncos continue preparation for the Raiders. (photos by Ben Swanson)
Emergency Room Care/ Denver ERs
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[Swedish Southwest ER](http://www.swedishhospital.com/conditions-we-treat/emergency-services /southwest-er.htm)
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