Seahawks signed LB Joel Iyiegbuniwe, formerly of the Bears, to a one-year, $1.18 million contract. 

Iyiegbuniwe (hamstring) was a full participant in Thursday's practice.

Iyiebuniwe (hamstring) is inactive for Sunday's game against the Raiders, Rich Campbell of the Chicago Tribune reports.

Iyiegbuniwe is doubtful to play Sunday against the Raiders in London due to a hamstring injury.