Before boarding their flight to London, England for Sunday's game against the San Francisco 49ers, the Denver Broncos had already ruled three players out for Sunday.

Today, the Broncos added a pair of names--cornerback Perrish Cox and defensive lineman Kevin Vickerson--to a list that already included linebackers Robert Ayers and Wesley Woodyard, as well as safety Darcel McBath.

For the 49ers, tight end Vernon Davis was officially listed as "questionable".

Denver

Out: LB Robert Ayers (foot), CB Perrish Cox (concussion), S Darcel McBath (ankle), DT Kevin Vickerson (groin), LB Wesley Woodyard (hamstring)
Probable: S Brian Dawkins (knee), CB Andre Goodman (quadriceps), WR Eddie Royal (groin)

San Francisco

Out: C Eric Heitmann (ankle), QB Alex Smith (shoulder)
Doubtful: CB Tarell Brown (back)
Questionable: TE Vernon Davis (ankle), RB Anthony Dixon (hamstring)
Probable: LB Ahmad Brooks (knee), CB Nate Clements (ankle), T Adam Snyder (back)