The Notre Dame vs. Michigan football game scheduled "under the lights" on 9.10.11 at Michigan Stadium opened with Michigan as a 2 point favorite.
The betting line now shows the IRISH as a SIX POINT Favorite.  I'm not a gambler, so I don't know how often you'll see an 8 point swing in a spread -- but that seems quite extreme.
What do the bettors know?   Here's a link:
LINK:  IRISH NOW A SIX POINT FAVORITE OVER MICHIGAN

 
