This is a system i've used last year and i've backtested for the 2009 too. Last year this system went 93-0 and in the 2009 was undefeated too. This is clearly a chase system, a 3 game chase system. I don't like to chase and i never use the chase system for other sports; but i think that baseball is perfect for a 3 game chase but you have to know what you are doing!
So basically this system is based on recent form, particularly i will back a team that is playing well at home and fading a team that is playing bad on the road. I apply also some common sens filter like avoid to bet on a poor team even if they are playing well recently. It is very important that the system have to start the first week of may and ends the last week of august. Last year there were 3 system losses in september, so i will stop to play at the end of august. I am pretty sure that doesn't exist a perfect and unbeatable system, so i would not be surprised if I will lose a couple of system series. Last year i' ve gone 7 times to C bet (all wons). So even with a 2 or 3 losses i will be able to gain a decent profit, especially because i will avoid to bet high juice. So the system start today