The Edmonton Oilers will have a little less depth when they face the Colorado Avalanche on Wednesday night.
Defenseman Andrew Ference and center Boyd Gordon will miss the contest with their respective injuries, both suffered in Edmonton's 4-1 loss to the Winnipeg Jets on Monday.
Ference was already ruled out, but he is now out indefinitely with a concussion, while Gordon is day-to-day with a back injury.
Keith Aulie and Luke Gazdic will draw in Wednesday against the Avalanche.