Play Unders for Game Total Wagers?

First of all this is just an idea floating around in my head, and should not only be used as food for thought. I have noticed a trend over the past 1-2 years that would have made you rich. I do not; however, have any reason to believe that the trend will continue.

Game totals are a funny thing that I am always thinking about, and there are a million ways to go about it. The first question (and this is what got me thinking) is what defines a high scoring or a low scoring game in any sport? You may initially think that it would be some average since the first game of the sport played, and this is for the most part true; but why should you really be interested in that if you are making a wager? Consider these recent records:

Under/over
NFL: 136-123
NBA: 322-301
NHL: 387-342
NCAAF: 397-361
NCAABB: 765-722
MLB: 1217-1087

My modeling typically shows the value is on the unders and dogs. Unfortunately you can get stretches of time where the overs come in like clockwork. Had a stretch in the NBA this season as a matter of fact. I would like to rethink the way I am doing this blogsite, and I thought that it would be good to inform you guys as best I can how an investor thinks so you can do it to.