Ryan won't be available for Thursday's matchup with Winnipeg due to concussion symptoms, Derek Van Diest of the Edmonton Sun reports.
Ryan should probably be considered out indefinitely until the Oilers release another update on his status. The 34-year-old vet has only picked up one goal while posting an ugly minus-10 rating through 15 games this season, so his absence will undoubtedly go unnoticed in most fantasy circles.