The Seattle Seahawks opened up camp Friday at the Virginia Mason Athletic Center (VMAC) in Renton, though several starters stayed on the sidelines.

Defensive starters safety Kam Chancellor and linebacker Bruce Irvin, and starting offensive lineman Russell Okung all sat out the first practice on Friday morning. All three had off-season surgeries. Chancellor had hip surgery, Irvin had his hip operated on as well. Okung underwent a procedure on his foot.

Linebackers Malcolm Smith and Korey Toomer, and rookie defensive back Eric Pinkins also did not practice, but their injuries were not disclosed.

In other news, running back Marshawn Lynch was not present for workouts. It was reported Thursday that Lynch was not going to attend camp, looking for a new contract.

The team also announced the signing of offensive lineman C.J. Davis and wide receiver David Gilreath.