The Oilers almost acquired defenseman Braydon Coburn from the Philadelphia Flyers in June, but talks broke off when the price tag went up.
While it's believed the Oilers and Flyers resumed discussions this season, MacTavish has also spoken to the Toronto Maple Leafs about Jake Gardiner and the Florida Panthers about Dmitry Kulikov.
The Oilers have also spoken with the New York Rangers about blueliner Michael Del Zotto, but the price appears to be too high and he would be a complimentary addition to MacTavish' primary search for a grittier blueline.
Oilers forward Ales Hemsky could be moved, as part of a trade, and is believed to be available.
Hemsky, 30, is in the final-year of his contract and can become an unrestricted free agent next summer.
With the amount of young depth the Oilers have up front, Hemsky might not be brought back beyond this season, and trading him, perhaps closer to the March 5 trade deadline, might land Edmonton a greater return.