Here are the Money Line reults for all MLB Favorites vs. a progressive dime line over the last three full seasons. Notice the "suicide" cutoff during this period was at -140, which is where ROI starts to get significantly worse. Yes the ROI is abnormally low in the -180 to -199 range, but that simply looks like an anomely given the relatively small sample size.
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MLB RESULTS BY MONEY LINE - 2004 to 2006
Fave Line W L Pct Units ROI
-106 to -119 768 709 52.0% -26.01 -1.8%
-120 to -129 546 458 54.4% -18.82 -1.9%
-130 to -139 540 417 56.4% -15.21 -1.6%
-140 to -149 451 361 55.5% -66.26 -8.2%
-150 to -159 343 254 57.5% -48.51 -8.1%
-160 to -179 583 373 61.0% -40.71 -4.3%
-180 to -199 260 143 64.5% -6.04 -1.5%
-200 to -224 269 135 66.6% -14.33 -3.5%
-225 to -249 121 57 68.0% -13.04 -7.3%
-250 to -299 113 46 71.1% -6.34 -4.0%
-300 to -399 57 23 71.3% -17.98 -22.5%
-400+ 4 1 80.0% -0.6 -12.0%
ALL Faves 4055 2977 57.7% -273.85 -3.9%
-106 to -139 1854 1584 53.9% -60.04 -1.7%
-140+ 2201 1393 61.2% -213.81 -5.9%
ALL Faves 4055 2977 57.7% -273.85 -3.9%