Well, this year, Don Sweeney came in and stabilized the defense, leaving Erskine as the odd man out. He also had major injury problems, first injuring his leg (don't remember the precise injury) on a conditioning stint to Utah. Right when he was about to return from that injury, he was diagnosed with sports hernia and underwent surgery that ended his season.
The Stars expect him to be part of their blueline next year. Whether that's a good thing or not, I'm not so sure yet.