Diligent Youtube commenters (and yours truly) have the hunch that this is actually a Husky and not a wild wolf, judging by its demeanor and size. That all said, chalk another one up on the "This Olympics is Totally Nuts" column.
UPDATE: This just keeps happening, doesn't it? In a move that shouldn't surprise anyone, this was another prank set up by Jimmy Kimmel. Check out the full clip here:
And here's Kimmel's entire bit: