q,
I would stay away from the +1.5's
not because that one happened to lose, but because the ONLY time the +1.5 holds value is when the game lands on an EXACT one run differential, and it HAS to be the right team that wins by one. In other words it is far more likely for the game NOT to land on an exact score which in essence you are predicting with a +1.5, it is much more probable for a game to land on anything BUT a one run score.
there are spots in which the +1.5 holds value, as with anything else, and the low total games obviously are where to look, but usually the line is adjusted too much for that. Just my thoughts, I had DET +1.5 +200 or so last year against Pedro, it was tied and I think it went to extra innings before Boston scored two to ruin the bet.