I will look at the online previews to compare ERA's, batting averages, RBI's, Whip, and numerous other things, make my best educated guess and still something seems to always happen to knock you out. When you buy an O/U down a run you still get beat by a half, when you need a homerun you can find one in three states and when you don't need one to seal a game someone hits one in the top of the ninth. It just goes on and on. Like you said never bet on basball. Hope you knock your parlay out of the park.
