I hope I'm posting this in the right place...

http://www.statfox.com/mlb/ mlbteam~teamid~ARIZONA~season~2009~log~1
.htm

I was wondering where the odds for individual games are from? Is it an average of odds from a number of bookmakers? If so, which ones? I am trying to build a model and I need to backtest it, so I really need to know where this website gets its odds.

Thanks!