Great reasoning, Flethcher.
I agree with his method of parlaying teams laying big numbers. Absolutely no value in playing them straight, and certainly minimizes your losses should that team lose. As an example, I remember two yrs ago when Randy Johnson went through that horrendous streak losing by a run or two. Imaging laying -300 everytime.
If you're an underdog player there's nothing like baseball. Last yr the Braves as faves were good go-against plays in certain situations. Their offense was downright offensive at times. Yet they remained mid to high faves because of Maddux, Glavine, et al. But instead of playing the underdog (i.e. Expos, Marlins) on the ML, I went with the runline just to be "safe". As Fletch said, best scenario is when it's likely a pitchers duel.