Surratt (calf) has been ruled out for Thursday night's contest against the Broncos, John Boyle of the Seahawks' official site reports.
Surratt was unable to practice at all this week, and he will now be forced to miss a third straight contest while nursing a calf injury. In his absence, Seattle will once again have to find a fill-in for Surratt's workload with the special-teams unit.