Austin suffered the injury Dec. 8 against Arizona and has not played or practiced since, missing games against New Orleans and Tampa Bay. Rams coach Jeff Fisher has expressed optimism the past couple of weeks that Austin might be able to return in time to get back on the field, but time is running out for that to happen.
The Rams have one more practice Friday before traveling to Seattle for the season finale. If Austin doesn't at least get some work in at practice, it seems likely his season will end without another appearance.
Defensive end Chris Long returned to practice as a full participant after sitting out Wednesday with a thigh injury.