That said I am calling this system 1.
The play here is to bet on any road team in the first game of a series that is coming off a loss. The plays don't start until after May 1st and continue through the end of the season. All is based on $100 plays. (As a note while the 2001 season is included I noticed that it does not include data for the Cincinnati Reds. I don't know why and just haven't had time to fix it)
I will break down a few of the different approaches and show the one I'm using.
1999 126 93 58% $1,323.27 1.91
2000 123 83 60% $2,308.44 1.88
2001 98 70 58% $1,063.93 1.87
2002 151 82 65% $3,819.82 1.84
2003 127 100 56% $778.23 1.89
2004 126 112 53% $(1,531.81) 1.86
2005 108 104 51% $(1,637.14) 1.83
2006 135 93 59% $1,668.37 1.83
2007 128 108 54% $(724.76) 1.81
2008 117 95 55% $(47.22) 1.82
1239-940 (57%)with a profit of $7021.13. This betting into an average line of about -120.
If we add in that the home team must be coming off a win.
1999 50 36 0.581395349 $172.05 1.85
2000 48 36 0.571428571 $584.40 1.87
2001 36 28 0.5625 $(147.67) 1.86
2002 72 33 0.685714286 $1,975.11 1.77
2003 62 42 0.596153846 $1,104.05 1.89
2004 56 42 0.571428571 $216.93 1.81
2005 46 40 0.534883721 $(48.20) 1.83
2006 57 38 0.6 $643.18 1.83
2007 63 41 0.605769231 $884.68 1.79
2008 45 49 0.478723404 $(1,479.93) 1.78
535-385 (58%) with a profit $3,904.61 and an average line of -120. Not much improvement.
How about back to any road team off a loss but no bets over -150
1999 87 78 53% $871.33 2.04
2000 84 73 54% $1,100.27 1.98
2001 65 54 55% $737.15 2.00
2002 84 55 60% $3,182.65 2.07
2003 80 70 53% $1,297.41 2.07
2004 85 83 51% $(653.32) 1.99
2005 68 76 47% $(995.10) 1.97
2006 93 74 56% $1,288.24 1.94
2007 82 83 50% $(752.68) 1.93
2008 78 71 52% $102.28 1.93
Not to bad. 806-717 (53%) with a $6178 profit over 10 years betting into an average line of about even money.