Spoke to Neil Smith this am about this, from a logistics perspective only. So the Stars could waive Avery, he would clear. They would then recall him. Assuming the Leafs were able to get him on a claim, his salary would go down to about 2 million. The Leafs would then trade Blake to Dallas for a 2nd round pick.
Leafs dump Blake, and his $, get avery at a decent discount and a 2nd round pick